xxxxxxxxxx
scaler = StandardScaler()
fit_data_scaled = scaler.fit_transform(fit_data)
vtest_data_scaled = scale.transform(vtest_data)
predict_data_scaled = scale.transform(predict_data)
we only need to use scaler.fit_transform() just once. After that, it has learned everything it needs to learn about scalertransformingfrom then on
just scaler.transform()