CODE EXAMPLE FOR PYTHON

VectorIndexer pyspark

from pyspark.ml import Pipeline
from pyspark.ml.regression import LinearRegression
from pyspark.ml.feature import VectorIndexer
from pyspark.ml.evaluation import RegressionEvaluator

# Automatically identify categorical features, and index them.
# We specify maxCategories so features with > 4 distinct values are treated as continuous.

featureIndexer = VectorIndexer(inputCol="features", 
                               outputCol="indexedFeatures",
                               maxCategories=4).fit(transformed)

data = featureIndexer.transform(transformed)