transformReverseBarycentric: Convert from barycentric coordinates back to original...

In Zouter/triwise: Gene expression changes in three biological conditions

Description

Converts a dataframe contain barycentric coordinates in the x and y columns back to original coordinates (apart from a constant for each gene).

Usage

transformReverseBarycentric(barycoords, transfomatrix = NULL)

Arguments

barycoords	Dataframe of barycentric coordinates with x and y in separate columns
transfomatrix	NULL (default) or a numeric matrix containing the transformation matrix

Value

Matrix containing for every gene original expression values centered around 0

Examples

Eoi = matrix(rnorm(1000*3, sd=0.5), 1000, 3, dimnames=list(1:1000, c(1,2,3)))
Eoi[1:100,1] = Eoi[1:100,1] + 1
barycoords = transformBarycentric(Eoi)
reversebarycoords = transformReverseBarycentric(barycoords)
all.equal(scale(t(Eoi)), scale(t(reversebarycoords)), check.attributes=FALSE)

Zouter/triwise documentation built on May 10, 2019, 1:59 a.m.