collapse_to_window_size: Collapse Matrix To Windows by Window Size
In manschmi/RMetaTools: Tools For Metagene Analysis

Description Usage Arguments Details Value Examples

Averages Matrix Columns into Windows using an Averaging Function amd a defined window size

1	collapse_to_window_size(mat, collapse_fun = rowMeans, window_size = 10)

`mat`	matrix
`collapse_fun`	function for averaging values inside windows (Default = rowMeans, see Details).
`window_size`	size for binning in bp (default=10, ie average over 10nt)

for a matrix with ncol=100 and window_size=10, will return a matrix with ncol=10. collapse_fun is a function that functions as ie rowMeans (the default) or rowSums.

matrix with ncol(input matrix)/window_size columns

mat <- matrix(1:1000, nrow=10, ncol=100)
matc <- collapse_to_n_windows(anno, mat, mean, 10)
dim(matc)

log2RowMeans <- function(mat, pseudocount=1){apply(mat,1,function(row) mean(log2(row+pseudocount)))}
matc <- collapse_to_window_size(mat, log2RowMeans, 10)
dim(matc)