get min and max from a specific column scala spark dataframe

Question

I would like to access to the min and max of a specific column from my dataframe but I don\'t have the header of the column, just its number, so I should I do using scala ?

Answer 1

You can use pattern matching while assigning variable:

import org.apache.spark.sql.functions.{min, max}
import org.apache.spark.sql.Row

val Row(minValue: Double, maxValue: Double) = df.agg(min(q), max(q)).head

Where q is either a Column or a name of column (String). Assuming your data type is Double.