[sklearn][standardscaler] can I inverse the standardscaler for the model output?

问题

I have some data structured as below, trying to predict t from the features.

train_df

t: time to predict
f1: feature1
f2: feature2 
f3:......

Can t be scaled with StandardScaler, so I instead predict t' and then inverse the StandardScaler to get back the real time?

For example:

from sklearn.preprocessing import StandardScaler
scaler = StandardScaler()
scaler.fit(train_df['t'])
train_df['t']= scaler.transform(train_df['t'])

run regression model,

check score,

!! check predicted t' with real time value(inverse StandardScaler) <- possible?

回答1:

Yeah, and it's conveniently called inverse_transform.

The documentation provides examples of its use.

回答2:

Here is sample code. You can replace here data with train_df['colunm_name']. Hope it helps.

from sklearn.preprocessing import StandardScaler
data = [[1,1], [2,3], [3,2], [1,1]]
scaler = StandardScaler()
scaler.fit(data)
scaled = scaler.transform(data)
print(scaled)

# for inverse transformation
inversed = scaler.inverse_transform(scaled)
print(inversed)

来源：https://stackoverflow.com/questions/44552031/sklearnstandardscaler-can-i-inverse-the-standardscaler-for-the-model-output