Read in the motif rankings and transform them into a matrix

This function loads in the .feather files with the motif to target gene rankings. These can be found here: https://resources.aertslab.org/cistarget/databases/

Usage

read_motif_ranking(ranking_file)

Arguments

ranking_file

String. The file path to the .feather file

Value

An integer matrix that has been transposed for easier use in the underlying Rust code.