Title: Rescale A Feature
Slug: rescale_a_feature
Summary: How to rescale a feature for machine learning in Python.
Date: 2016-09-06 12:00
Category: Machine Learning
Tags: Preprocessing Structured Data
Authors: Chris Albon

Preliminaries



In [1]:

    
# Load libraries
from sklearn import preprocessing
import numpy as np

Create Feature



In [2]:

    
# Create feature
x = np.array([[-500.5], 
              [-100.1], 
              [0], 
              [100.1], 
              [900.9]])

Rescale Feature Using Min-Max



In [3]:

    
# Create scaler
minmax_scale = preprocessing.MinMaxScaler(feature_range=(0, 1))

# Scale feature
x_scale = minmax_scale.fit_transform(x)

# Show feature
x_scale









    Out[3]:





array([[ 0.        ],
       [ 0.28571429],
       [ 0.35714286],
       [ 0.42857143],
       [ 1.        ]])