columnwise: Apply a function columnwise to groups of rows

In cbhelmholtz/metaboliteqc: metaboliteqc --- Quality controling metabolite data

Description

Apply a function columnwise to groups of rows

Usage

columnwise(f, mat, by, ...)

Arguments

f	Function
mat	Matrix
by	Factor of length nrow(mat) used to group rows
...	Arguments passed on to f

Value

A matrix with ncol(mat) columns and length(unique(by)) * n rows, where n is the length of the result returned by f.

cbhelmholtz/metaboliteqc documentation built on May 13, 2019, 2:03 p.m.