CODE EXAMPLE FOR PYTHON

minmaxscaler transform

# Scale the features to between -1 and 1
from sklearn.preprocessing import MinMaxScaler
scaler=MinMaxScaler((-1,1))
x=scaler.fit_transform(features)
y=labels

# Inverse trasnforms
scaler.inverse_transform(x)
https://scikit-learn.org/stable/modules/generated/sklearn.preprocessing.MinMaxScaler.html