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

How about getting the column name from the metadata:

val selectedColumnName = df.columns(q) //pull the (q + 1)th column from the columns array
df.agg(min(selectedColumnName), max(selectedColumnName))