35 lines
1.4 KiB
Python
35 lines
1.4 KiB
Python
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import zipfile
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import numpy as np
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import pandas as pd
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from sklearn import preprocessing
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with zipfile.ZipFile('covid-world-vaccination-progress.zip', 'r') as zip_ref:
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zip_ref.extractall(".")
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df = pd.read_csv('country_vaccinations.csv')
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# podział danych na train/validate/test (6:2:2) za pomocą biblioteki numpy i pandas
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train, validate, test = np.split(df.sample(frac=1), [int(.6*len(df)), int(.8*len(df))])
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# Wypisanie ilości elementów w poszczególnych ramkach danych
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print("Whole set size".ljust(20), df.size)
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print("Train set size: ".ljust(20), train.size)
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print("Validate set size: ".ljust(20), validate.size)
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print("Test set size: ".ljust(20), test.size)
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df.describe(include='all')
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for col in df.columns:
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column = df[col].value_counts().plot(kind="bar",figsize=(30,10))
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print("\n", col)
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print(column)
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# normalizacja wartości numerycznych
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numeric_values = df.select_dtypes(include='float64').values # tylko wartości numeryczne
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min_max_scaler = preprocessing.MinMaxScaler()
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x_scaled = min_max_scaler.fit_transform(values)
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numeric_columns = df.select_dtypes(include='float64').columns
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df_normalized = pd.DataFrame(x_scaled, columns=numeric_columns)
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for col in df.columns: # usunięcie nieznormalizowanych danych i wstawienie nowych już znormalizowanych do oryginalnej ramki danych
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if col in numeric_columns: df[col] = df_normalized[col]
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df.dropna() # usunięcie wierszy z polami NaN
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