Sklearn Transform Error: Expected 2d Array, Got 1d Array Instead

I use sklearn to transform data with this code. sc = MinMaxScaler() test= df['outcome'] y = sc.fit_transform(test) It show error like this. ValueError: Expected 2D array, got 1D

Solution 1:

If I remember correctly, MinMaxScalar can accept a pandas dataframe but not a series, so just do test = df[['outcome']] (dataframe with one column) instead of test = df['outcome'] (a series).

Solution 2:

MinMaxScaler required numpy input shape as (num_sample,1) but you are giving input as shape (num_sample,) Try this code :

sc = MinMaxScaler()
test= df['outcome'].values #convert to numpy arrayy = sc.fit_transform(test.reshape(-1,1))