Helper function to simplify workflow with lists of functions.
colapply_functions(obj, flist)Matrix or data.frame (same type as obj) with names taken from obj.
2-dimensional array (matrix or data.frame).
List of functions of length equal to the number of columns of obj.
Each entry must be a function applicable to a single column of obj.
The i-th entry of flist is applied to the i-th column of obj.