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+1
-3
@@ -185,6 +185,4 @@ ipython_config.py
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.conda*/
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.conda*/
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dead/
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data/
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# for rn
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Vendored
+4
-1
@@ -1,3 +1,6 @@
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{
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{
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"recommendations": ["ms-python.python", "ms-toolsai.jupyter"]
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"recommendations": [
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"ms-python.python",
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"ms-toolsai.jupyter"
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]
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}
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}
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@@ -14,8 +14,10 @@ how to git? do not `push --force`. prefer pull requests. its like github
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we will plan to do this in multiple different ways using scikit-learn and pytorch. tensorflow is ancient.
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we will plan to do this in multiple different ways using scikit-learn and pytorch. tensorflow is ancient.
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> [!IMPORTANT]
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> [!NOTE]
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> phase out tensorflow. dont use it.
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> ~phase out tensorflow. dont use it.~
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>
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> its 2 different platforms for 2 different types of people. use whatever ig
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maybe also fit more weather related stats? this dataset is taken from nasa so sources are there
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maybe also fit more weather related stats? this dataset is taken from nasa so sources are there
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-14429
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+19
-3
@@ -1,10 +1,11 @@
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import urllib.parse
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import urllib.parse
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import urllib.request
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import urllib.request
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from datetime import datetime
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from datetime import datetime
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from global_config import DATA_FILE_NAME
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# Define parameters
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# Define parameters
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latitude, longitude = 21.04815477090267, 105.80123159165096 # lmao
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latitude, longitude = 21.04815477090267, 105.80123159165096 # lmao
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start_date = "2010-01-01"
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start_date = "1981-01-01"
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end_date = datetime.now().strftime("%Y-%m-%d") # Today's date
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end_date = datetime.now().strftime("%Y-%m-%d") # Today's date
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# Define desired parameters
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# Define desired parameters
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@@ -16,9 +17,24 @@ end_date = datetime.now().strftime("%Y-%m-%d") # Today's date
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# WS10M MERRA-2 Wind Speed at 10 Meters (m/s)
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# WS10M MERRA-2 Wind Speed at 10 Meters (m/s)
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# WD10M MERRA-2 Wind Direction at 10 Meters (Degrees)
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# WD10M MERRA-2 Wind Direction at 10 Meters (Degrees)
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# more at https://power.larc.nasa.gov/data-access-viewer/
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# more at https://power.larc.nasa.gov/data-access-viewer/
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weather_params = [
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# "T2M",
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# "T2M_MAX",
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# "T2M_MIN",
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# "T2MDEW",
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# "PRECTOTCORR",
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"QV2M",
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# "RH2M",
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# "PS",
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# "CLOUD_AMT",
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# "WS10M",
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# "WD10M",
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# "ALLSKY_KT",
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# "ALLSKY_SFC_SW_DWN",
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]
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params = {
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params = {
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"parameters": "QV2M,T2M,PRECTOTCORR",
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"parameters": ",".join(weather_params),
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"community": "RE",
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"community": "RE",
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"longitude": longitude,
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"longitude": longitude,
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"latitude": latitude,
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"latitude": latitude,
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@@ -40,7 +56,7 @@ try:
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with urllib.request.urlopen(url) as response:
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with urllib.request.urlopen(url) as response:
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if response.status == 200:
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if response.status == 200:
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csv_data = response.read().decode("utf-8")
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csv_data = response.read().decode("utf-8")
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with open("hanoi_weather_data.csv", "w", encoding="utf-8") as file:
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with open(DATA_FILE_NAME, "w", encoding="utf-8") as file:
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file.write(csv_data)
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file.write(csv_data)
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print("Data successfully downloaded and saved to 'hanoi_weather_data.csv'.")
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print("Data successfully downloaded and saved to 'hanoi_weather_data.csv'.")
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else:
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else:
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+2100
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@@ -8,7 +8,7 @@ from sklearn.preprocessing import MinMaxScaler
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import numpy as np
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import numpy as np
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from load_data import load_this_data
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from load_data import load_this_data
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a = load_this_data("dataset.csv")
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a = load_this_data()
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# time series forecasting
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# time series forecasting
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@@ -19,6 +19,7 @@ scaled_data = scaler.fit_transform(a)
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def create_sequences(data, seq_length):
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def create_sequences(data, seq_length):
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"see this? return[0] is the big x and return[1] is the big y. and h(x) = y. and h(x) is the model."
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xs = []
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xs = []
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ys = []
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ys = []
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for i in range(len(data) - seq_length):
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for i in range(len(data) - seq_length):
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@@ -0,0 +1 @@
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DATA_FILE_NAME = "data/hanoi_weather_data.csv"
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@@ -5,9 +5,6 @@ import io
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# from itertools import islice
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# from itertools import islice
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from typing import Union
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from typing import Union
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import pandas as pd
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def cut_headers(stream: Union[io.StringIO, io.FileIO, io.TextIOWrapper]):
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def cut_headers(stream: Union[io.StringIO, io.FileIO, io.TextIOWrapper]):
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headers = []
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headers = []
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exist_startheader = False
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exist_startheader = False
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@@ -29,59 +26,3 @@ def cut_headers(stream: Union[io.StringIO, io.FileIO, io.TextIOWrapper]):
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stream.seek(0)
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stream.seek(0)
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return "", stream
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return "", stream
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return "\n".join(headers), stream
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return "\n".join(headers), stream
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# if __name__ == "__main__":
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# with open("hanoi_qv2m_latest.csv", "r", encoding="utf-8") as file:
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# header, file = cut_headers(file)
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# print("Extracted Header:")
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# print(header)
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# data = pd.read_csv(file)
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# print("\nFirst 5 Lines of Data:")
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# print(data.head())
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# print(data.isnull().sum())
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def load_data(
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weather_file_name, columns=["Year", "Month", "Day", "Humidity"].copy(), na=-999
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):
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with open(weather_file_name, "r", encoding="utf-8") as file:
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_header, file = cut_headers(file)
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data = pd.read_csv(file, na_values=na)
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# print(header)
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data.columns = columns
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return data
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def date_combine(data: pd.DataFrame):
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data["Date"] = pd.to_datetime(data[["Year", "Month", "Day"]])
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data = data.drop(columns=["Year", "Month", "Day"])
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data = data.set_index("Date")
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return data
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def validate_view(data: pd.DataFrame, verbose=False):
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if verbose:
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print(f"Shape with N/A values: {data.shape}")
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isn = data.isnull().sum().iloc[0]
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print(f"Count of N/A values: {isn}")
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data = data.dropna() # Drop the rows with missing values
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if verbose:
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isn = data.isnull().sum().iloc[0]
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print(f"Count after drop: {isn}")
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print(data.describe())
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return data
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# if __name__ == "__main__":
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def load_this_data(filename, verbose=False):
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d = load_data(filename)
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# if verbose:
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# print(d.columns)
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d = date_combine(d)
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# if verbose:
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# print(d.columns)
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d = validate_view(d, verbose)
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# if verbose:
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# print(d.columns)
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return d
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-1161
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import sys
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import numpy as np
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import pandas as pd
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from sklearn.metrics import r2_score
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from sklearn.preprocessing import MinMaxScaler
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from sklearn.model_selection import train_test_split
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from sklearn.ensemble import RandomForestRegressor
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from sklearn.metrics import mean_squared_error
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import matplotlib.pyplot as plt
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from global_config import DATA_FILE_NAME
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from load_data import cut_headers
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# 1. Load data
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with open(DATA_FILE_NAME, "r", encoding="utf-8") as file:
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data_header, csv_file = cut_headers(file)
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data = pd.read_csv(csv_file, na_values=-999)
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if all(z in data.columns for z in ("YEAR", "MO", "DY")):
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data["date"] = pd.to_datetime(
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{k: data[v] for v, k in (zip(["YEAR", "MO", "DY"], ["year", "month", "day"]))}
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)
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data.drop(inplace=True, columns=["YEAR", "MO", "DY"])
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data.set_index(["date"], inplace=True)
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data.dropna(inplace=True)
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# 2. Normalize data
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scaler = MinMaxScaler()
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print(data.columns)
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scaled_data = scaler.fit_transform(data)
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# 3. Create sequences for supervised learning
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def create_sequences(data, seq_length):
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xs, ys = [], []
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for i in range(len(data) - seq_length):
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x = data[i : i + seq_length].flatten()
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y = data[i + seq_length]
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xs.append(x)
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ys.append(y)
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return np.array(xs), np.array(ys)
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seq_length = 50
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X, y = create_sequences(scaled_data, seq_length)
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# 4. Split into training and testing
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X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.02, shuffle=False)
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# 5. Train linear regression model
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model = RandomForestRegressor(
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n_estimators=200, # Number of trees
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# max_features='sqrt', # Features considered at each split
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# max_depth=30, # Maximum depth of each tree
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# n_jobs=-1, # Use all CPU cores
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random_state=42 # Reproducibility
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)
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model.fit(X_train, y_train)
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# 6. Make predictions
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predictions = model.predict(X_test)
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# 7. Evaluate performance
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mse = mean_squared_error(y_test, predictions)
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r2 = r2_score(y_test, predictions)
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print(f"Test MSE: {mse:.4f}")
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print(f"Test r2: {r2:.4f}")
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print(f"Score: {model.score(X_test, y_test)}")
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# 8. Inverse transform predictions
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predictions_rescaled = scaler.inverse_transform(predictions.reshape(-1, data.shape[1]))
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y_test_rescaled = scaler.inverse_transform(y_test.reshape(-1, data.shape[1]))
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# 9. Plot results
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for i, column in enumerate(data.columns):
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plt.figure(figsize=(10, 5))
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plt.plot(y_test_rescaled[:, i], label=f"Actual {column}")
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plt.plot(predictions_rescaled[:, i], label=f"Predicted {column}")
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plt.title(f"Actual vs. Predicted for {column}")
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plt.xlabel("Sample")
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plt.ylabel("Value")
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plt.legend()
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plt.tight_layout()
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plt.show()
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@@ -1,304 +0,0 @@
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"""
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This script demonstrates how to port a TensorFlow LSTM model to PyTorch.
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It includes detailed explanations for every step.
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"""
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# Step 1: Import necessary libraries
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# ----------------------------------
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# PyTorch is the core library for building and training neural networks.
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# Torch.nn contains modules for defining layers and loss functions.
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# Torch.optim provides optimizers like Adam for training.
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import matplotlib.pyplot as plt
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import numpy as np
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import torch
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from sklearn.model_selection import train_test_split
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from sklearn.preprocessing import MinMaxScaler
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from torch import nn, optim
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from torch.utils.data import DataLoader, TensorDataset
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import sys
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sys.path.append(r"c:\Users\Admin\Documents\lecture ass shit\ml1\codemidterm\ml_midterm")
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from load_data import load_this_data
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# Step 2: Data Preparation
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# ------------------------
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# In PyTorch, data must be converted into tensors. We'll simulate the data
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# preprocessing steps from your TensorFlow code.
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# Simulate some data (replace this with your actual data loading logic)
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np.random.seed(42) # For reproducibility
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# data = np.sin(np.linspace(0, 100, 1000)) # Example: Sine wave data
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# data = data.reshape(-1, 1) # Reshape to (samples, features)
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# Load the dataset (replace "dataset.csv" with your actual file path)
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data = load_this_data("dataset.csv")
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# Extract the "Humidity" column as the target variable
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data = data["Humidity"].values.reshape(-1, 1)
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# Normalize the data using MinMaxScaler (same as in TensorFlow)
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scaler = MinMaxScaler()
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data_scaled = scaler.fit_transform(data)
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# Define lookback window (sequence length for LSTM)
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n_lookback = 100 # Number of past timesteps to consider
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n_features = 1 # Number of features (e.g., 1 for univariate time series)
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# Helper function to create sequences
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def create_sequences(data, n_lookback):
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"""
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Create sequences of length n_lookback for LSTM input.
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Args:
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data: Scaled data as a NumPy array or PyTorch tensor.
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n_lookback: Number of past timesteps to consider.
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Returns:
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x: Input sequences of shape (num_samples, n_lookback, n_features).
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y: Target values of shape (num_samples, 1).
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"""
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x, y = [], []
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for i in range(len(data) - n_lookback):
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x.append(data[i : i + n_lookback])
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y.append(data[i + n_lookback])
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return np.array(x), np.array(y)
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# Split into training and testing sets
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split_index = int(0.8 * len(data_scaled))
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train_data = data_scaled[:split_index]
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test_data = data_scaled[split_index:]
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# Create sequences for training and testing
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train_x, train_y = create_sequences(train_data, n_lookback)
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test_x, test_y = create_sequences(test_data, n_lookback)
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# train_y = scaler.transform(train_y)
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# test_y = scaler.transform(test_y)
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# Convert sequences to PyTorch tensors
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train_x = torch.tensor(train_x, dtype=torch.float32)
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train_y = torch.tensor(train_y, dtype=torch.float32)
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test_x = torch.tensor(test_x, dtype=torch.float32)
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test_y = torch.tensor(test_y, dtype=torch.float32)
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# Create datasets and dataloaders
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train_dataset = TensorDataset(train_x, train_y)
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test_dataset = TensorDataset(test_x, test_y)
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train_loader = DataLoader(train_dataset, batch_size=32, shuffle=True)
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test_loader = DataLoader(test_dataset, batch_size=32, shuffle=False)
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# Step 3: Define the LSTM Model
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# -----------------------------
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# PyTorch models are defined by subclassing `nn.Module`.
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||||||
# The forward method specifies how data flows through the model.
|
|
||||||
|
|
||||||
|
|
||||||
# class LSTMModel(nn.Module):
|
|
||||||
# def __init__(self, n_features, n_lookback, n_neurons):
|
|
||||||
# """
|
|
||||||
# Initialize the LSTM model.
|
|
||||||
|
|
||||||
# Args:
|
|
||||||
# n_features: Number of input features (e.g., 1 for univariate time series).
|
|
||||||
# n_lookback: Number of past timesteps to consider.
|
|
||||||
# n_neurons: Number of neurons in each LSTM layer.
|
|
||||||
# """
|
|
||||||
# super(LSTMModel, self).__init__()
|
|
||||||
# self.lstm1 = nn.LSTM(
|
|
||||||
# n_features,
|
|
||||||
# n_neurons,
|
|
||||||
# batch_first=True,
|
|
||||||
# dropout=0.2,
|
|
||||||
# )
|
|
||||||
# self.lstm2 = nn.LSTM(
|
|
||||||
# n_neurons,
|
|
||||||
# n_neurons,
|
|
||||||
# batch_first=True,
|
|
||||||
# )
|
|
||||||
# self.lstm3 = nn.LSTM(n_neurons, n_neurons, batch_first=True)
|
|
||||||
# self.lstm4 = nn.LSTM(n_neurons, n_neurons, batch_first=True)
|
|
||||||
# self.fc = nn.Linear(n_neurons, 1)
|
|
||||||
# self.dropout = nn.Dropout(0.2)
|
|
||||||
|
|
||||||
# def forward(self, x):
|
|
||||||
# """
|
|
||||||
# Forward pass through the model.
|
|
||||||
|
|
||||||
# Args:
|
|
||||||
# x: Input tensor of shape (batch, seq_len, n_features).
|
|
||||||
|
|
||||||
# Returns:
|
|
||||||
# Output tensor of shape (batch, 1).
|
|
||||||
# """
|
|
||||||
# x, _ = self.lstm1(x)
|
|
||||||
# x, _ = self.lstm2(x)
|
|
||||||
# x, _ = self.lstm3(x)
|
|
||||||
# x, _ = self.lstm4(x)
|
|
||||||
# x = self.dropout(x)
|
|
||||||
# x = self.fc(x[:, -1, :]) # Use the last timestep's output
|
|
||||||
# return x
|
|
||||||
|
|
||||||
print("Input sequences (x):", train_x.shape)
|
|
||||||
print("Target values (y):", train_y.shape)
|
|
||||||
|
|
||||||
print("Sample input:", train_x[0])
|
|
||||||
print("Corresponding target:", train_y[0])
|
|
||||||
|
|
||||||
class LSTMModel(nn.Module):
|
|
||||||
def __init__(self, n_features, n_lookback, n_neurons):
|
|
||||||
super(LSTMModel, self).__init__()
|
|
||||||
self.lstm = nn.LSTM(n_features, n_neurons, batch_first=True, dropout=0.2)
|
|
||||||
self.lstm2 = nn.LSTM(n_neurons, n_neurons, batch_first=True, dropout=0.2)
|
|
||||||
|
|
||||||
self.fc = nn.Linear(n_neurons, 1)
|
|
||||||
|
|
||||||
def forward(self, x):
|
|
||||||
x, _ = self.lstm(x)
|
|
||||||
x, _ = self.lstm2(x)
|
|
||||||
x = self.fc(x[:, -1, :]) # Use the last timestep's output
|
|
||||||
return x
|
|
||||||
|
|
||||||
|
|
||||||
# Instantiate the model
|
|
||||||
n_neurons = 128 # Number of neurons in the LSTM
|
|
||||||
model = LSTMModel(n_features, n_lookback, n_neurons)
|
|
||||||
|
|
||||||
# Step 4: Define Loss Function and Optimizer
|
|
||||||
# ------------------------------------------
|
|
||||||
# Loss function: Mean Squared Error (MSE) for regression tasks.
|
|
||||||
# Optimizer: Adam optimizer for efficient training.
|
|
||||||
criterion = nn.MSELoss()
|
|
||||||
optimizer = optim.Adam(model.parameters(), lr=0.001)
|
|
||||||
|
|
||||||
# Step 5: Train the Model
|
|
||||||
# -----------------------
|
|
||||||
# PyTorch requires an explicit training loop. This gives you full control
|
|
||||||
# over the training process.
|
|
||||||
|
|
||||||
epochs = 50 # Number of training epochs
|
|
||||||
|
|
||||||
# Check for CUDA and set the device
|
|
||||||
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
|
|
||||||
print(f"Using device: {device}")
|
|
||||||
|
|
||||||
# Move the model to the device
|
|
||||||
model = LSTMModel(n_features, n_lookback, n_neurons).to(device)
|
|
||||||
|
|
||||||
# scheduler = optim.lr_scheduler.ReduceLROnPlateau(
|
|
||||||
# optimizer, mode="min", patience=5, factor=0.5, min_lr=1e-6
|
|
||||||
# )
|
|
||||||
# Move data to the device during training and evaluation
|
|
||||||
for epoch in range(epochs):
|
|
||||||
model.train() # Set the model to training mode
|
|
||||||
train_loss = 0.0
|
|
||||||
|
|
||||||
for x_batch, y_batch in train_loader:
|
|
||||||
# Move data to the device
|
|
||||||
x_batch = x_batch.to(device)
|
|
||||||
y_batch = y_batch.to(device)
|
|
||||||
# Reshape input to (batch, seq_len, n_features)
|
|
||||||
x_batch = x_batch.view(-1, n_lookback, n_features)
|
|
||||||
# y_batch = y_batch.view(-1, 1)
|
|
||||||
# print("x_batch shape:", x_batch.shape)
|
|
||||||
# print("y_batch shape:", y_batch.shape)
|
|
||||||
# print("x_batch dtype:", x_batch.dtype)
|
|
||||||
# print("y_batch dtype:", y_batch.dtype)
|
|
||||||
# break
|
|
||||||
# Zero the gradients from the previous step
|
|
||||||
optimizer.zero_grad()
|
|
||||||
|
|
||||||
# Forward pass: Compute predictions
|
|
||||||
predictions = model(x_batch)
|
|
||||||
# if epoch == 32:
|
|
||||||
# for name, param in model.named_parameters():
|
|
||||||
# if param.grad is not None:
|
|
||||||
# print(f"{name} gradient mean: {param.grad.mean().item()}")
|
|
||||||
# else:
|
|
||||||
# print(f"{name} has no gradient")
|
|
||||||
# print("Predictions device:", predictions.device)
|
|
||||||
# print("y_batch device:", y_batch.device)
|
|
||||||
# print("Predictions shape:", predictions.shape)
|
|
||||||
# print("y_batch shape:", y_batch.shape)
|
|
||||||
# Compute the loss
|
|
||||||
loss = criterion(predictions, y_batch)
|
|
||||||
|
|
||||||
# Backward pass: Compute gradients
|
|
||||||
loss.backward()
|
|
||||||
|
|
||||||
# Clip gradients to prevent exploding gradients
|
|
||||||
torch.nn.utils.clip_grad_norm_(model.parameters(), max_norm=1.0)
|
|
||||||
|
|
||||||
# Update model parameters
|
|
||||||
optimizer.step()
|
|
||||||
# scheduler.step(train_loss / len(train_loader))
|
|
||||||
# Accumulate the loss for reporting
|
|
||||||
train_loss += loss.item()
|
|
||||||
|
|
||||||
# Print epoch loss
|
|
||||||
print(f"Epoch {epoch+1}/{epochs}, Loss: {train_loss/len(train_loader):.4f}")
|
|
||||||
|
|
||||||
if epoch % 10 == 0: # Print every 10 epochs
|
|
||||||
print(
|
|
||||||
f"Sample prediction: {predictions[0].item()}, Actual: {y_batch[0].item()}"
|
|
||||||
)
|
|
||||||
# Step 6: Evaluate the Model
|
|
||||||
# --------------------------
|
|
||||||
# Switch to evaluation mode and disable gradient computation.
|
|
||||||
model.eval()
|
|
||||||
with torch.no_grad():
|
|
||||||
predictions = []
|
|
||||||
actuals = []
|
|
||||||
|
|
||||||
for x_batch, y_batch in test_loader:
|
|
||||||
# Move data to the device
|
|
||||||
x_batch = x_batch.to(device)
|
|
||||||
y_batch = y_batch.to(device)
|
|
||||||
|
|
||||||
# Reshape input to (batch, seq_len, n_features)
|
|
||||||
# x_batch = x_batch.view(-1, n_lookback, n_features)
|
|
||||||
|
|
||||||
# Make predictions
|
|
||||||
preds = model(x_batch)
|
|
||||||
|
|
||||||
# Move predictions and actuals back to CPU for further processing
|
|
||||||
predictions.append(preds.cpu().numpy())
|
|
||||||
actuals.append(y_batch.cpu().numpy())
|
|
||||||
|
|
||||||
# Convert predictions and actuals to NumPy arrays for comparison
|
|
||||||
predictions = np.concatenate(predictions)
|
|
||||||
actuals = np.concatenate(actuals)
|
|
||||||
|
|
||||||
# Step 7: Post-Processing and Visualization
|
|
||||||
# -----------------------------------------
|
|
||||||
# Inverse transform the predictions and actuals to get original scale
|
|
||||||
predictions = scaler.inverse_transform(predictions)
|
|
||||||
actuals = scaler.inverse_transform(actuals)
|
|
||||||
|
|
||||||
# Plot the results
|
|
||||||
print("Sample scaled train_y:", train_y[:5])
|
|
||||||
print("Sample scaled test_y:", test_y[:5])
|
|
||||||
|
|
||||||
print("Predictions shape:", predictions.shape)
|
|
||||||
print("Actuals shape:", actuals.shape)
|
|
||||||
|
|
||||||
print("Sample inverse-transformed predictions:", predictions[:5])
|
|
||||||
print("Sample inverse-transformed actuals:", actuals[:5])
|
|
||||||
|
|
||||||
plt.figure(figsize=(20, 5))
|
|
||||||
plt.plot(actuals, label="Actual")
|
|
||||||
plt.plot(predictions, label="Predicted")
|
|
||||||
plt.legend()
|
|
||||||
plt.show()
|
|
||||||
|
|
||||||
from sklearn.metrics import r2_score, mean_squared_error
|
|
||||||
|
|
||||||
print("R² Score:", r2_score(actuals, predictions))
|
|
||||||
print("MSE:", mean_squared_error(actuals, predictions))
|
|
||||||
@@ -1,124 +0,0 @@
|
|||||||
"""this uses new tech
|
|
||||||
make by conda new -p path python=3.12; conda activate -p path; conda install all those shi
|
|
||||||
|
|
||||||
conda install pytorch torchvision torchaudio pytorch-cuda -c pytorch -c nvidia
|
|
||||||
"""
|
|
||||||
|
|
||||||
import sys
|
|
||||||
|
|
||||||
sys.path.append(".")
|
|
||||||
from load_data import load_this_data
|
|
||||||
import torch
|
|
||||||
|
|
||||||
# a = load_this_data("dataset.csv")
|
|
||||||
|
|
||||||
x = torch.tensor([[1, 2], [3, 4]])
|
|
||||||
print(x)
|
|
||||||
|
|
||||||
|
|
||||||
print(x.shape) # Output: torch.Size([2, 2])
|
|
||||||
print(x.dtype) # Output: torch.int64
|
|
||||||
print(x.device) # Output: cpu
|
|
||||||
|
|
||||||
y = torch.ones_like(x)
|
|
||||||
print(x + y)
|
|
||||||
print(x * y)
|
|
||||||
|
|
||||||
|
|
||||||
x = torch.randn(3, requires_grad=True)
|
|
||||||
y = x * 2
|
|
||||||
z = y.mean()
|
|
||||||
z.backward()
|
|
||||||
print(x.grad)
|
|
||||||
|
|
||||||
import torch.nn as nn
|
|
||||||
|
|
||||||
class SimpleNet(nn.Module):
|
|
||||||
def __init__(self):
|
|
||||||
super(SimpleNet, self).__init__()
|
|
||||||
self.fc = nn.Linear(2, 1)
|
|
||||||
|
|
||||||
def forward(self, x):
|
|
||||||
return self.fc(x)
|
|
||||||
|
|
||||||
|
|
||||||
model = SimpleNet()
|
|
||||||
sample_input = torch.tensor([[1.0, 2.0]])
|
|
||||||
output = model(sample_input)
|
|
||||||
print(output)
|
|
||||||
|
|
||||||
import torch.optim as optim
|
|
||||||
|
|
||||||
criterion = nn.MSELoss()
|
|
||||||
optimizer = optim.SGD(model.parameters(), lr=0.01)
|
|
||||||
|
|
||||||
for epoch in range(100):
|
|
||||||
optimizer.zero_grad()
|
|
||||||
outputs = model(sample_input)
|
|
||||||
loss = criterion(outputs, torch.tensor([[1.0]]))
|
|
||||||
loss.backward()
|
|
||||||
optimizer.step()
|
|
||||||
if (epoch+1) % 10 == 0:
|
|
||||||
print(f'Epoch [{epoch+1}/100], Loss: {loss.item():.4f}')
|
|
||||||
|
|
||||||
model.eval()
|
|
||||||
|
|
||||||
sample_input_2 = torch.tensor([[1.0, 2.0], [3.0, 4.0]])
|
|
||||||
output_2 = model(sample_input_2)
|
|
||||||
print(output_2)
|
|
||||||
|
|
||||||
|
|
||||||
from torchvision import datasets, transforms
|
|
||||||
from torch.utils.data import DataLoader
|
|
||||||
|
|
||||||
# Define a transform to normalize the data
|
|
||||||
transform = transforms.Compose([transforms.ToTensor()])
|
|
||||||
|
|
||||||
# Download and load the training data
|
|
||||||
train_dataset = datasets.MNIST(root='data', train=True, download=True, transform=transform)
|
|
||||||
train_loader = DataLoader(train_dataset, batch_size=64, shuffle=True)
|
|
||||||
|
|
||||||
|
|
||||||
# import torch.nn as nn
|
|
||||||
import torch.nn.functional as F
|
|
||||||
|
|
||||||
class Net(nn.Module):
|
|
||||||
def __init__(self):
|
|
||||||
super(Net, self).__init__()
|
|
||||||
self.fc1 = nn.Linear(28 * 28, 128)
|
|
||||||
self.fc2 = nn.Linear(128, 10)
|
|
||||||
|
|
||||||
def forward(self, x):
|
|
||||||
x = x.view(-1, 28 * 28) # Flatten the input
|
|
||||||
x = F.relu(self.fc1(x))
|
|
||||||
x = self.fc2(x)
|
|
||||||
return x
|
|
||||||
|
|
||||||
model_2 = Net()
|
|
||||||
criterion_2 = nn.CrossEntropyLoss()
|
|
||||||
optimizer_2 = torch.optim.SGD(model.parameters(), lr=0.01)
|
|
||||||
|
|
||||||
|
|
||||||
for epoch in range(35): # loop over the dataset multiple times
|
|
||||||
for inputs, labels in train_loader:
|
|
||||||
optimizer_2.zero_grad() # zero the parameter gradients
|
|
||||||
outputs = model_2(inputs) # forward
|
|
||||||
loss = criterion_2(outputs, labels) # compute loss
|
|
||||||
loss.backward() # backward
|
|
||||||
optimizer_2.step() # optimize
|
|
||||||
print(f'Epoch {epoch+1}, Loss: {loss.item()}')
|
|
||||||
|
|
||||||
|
|
||||||
test_dataset = datasets.MNIST(root='data', train=False, download=True, transform=transform)
|
|
||||||
test_loader = DataLoader(test_dataset, batch_size=64, shuffle=False)
|
|
||||||
|
|
||||||
|
|
||||||
correct = 0
|
|
||||||
total = 0
|
|
||||||
with torch.no_grad():
|
|
||||||
for inputs, labels in test_loader:
|
|
||||||
outputs = model_2(inputs)
|
|
||||||
_, predicted = torch.max(outputs.data, 1)
|
|
||||||
total += labels.size(0)
|
|
||||||
correct += (predicted == labels).sum().item()
|
|
||||||
print(f'Accuracy: {100 * correct / total}%')
|
|
||||||
Reference in new issue
Block a user