Setting columns of a matrix

ROOT
1

Hi,
Say I have a matrix(TMatrixD?) and three TArrayD’s(all of equal length). I want three columns of the matrix to be the three arrays. Can I do that without a loop? How?
Thanks in advance.

2

Hi,
I figured it out. It’s like this in case anyone ever searches for it:

TMatrixD dataEff(nrows,ncols);
TVectorD deCuts(nrows);
TMatrixDColumn(dataEff,theColumn)=deCuts;