Identify Numeric Columns by Index

A helper function that scans a data frame and returns the integer indices of the columns that contain numeric data.

This is primarily used internally by data loading functions to automatically distinguish quantitative intensity columns from metadata columns.

Usage

detect_intensity_cols(df)

Arguments

df

A data.frame to be scanned.

Value

An integer vector containing the column indices of all numeric columns found in the input data.frame.