Date: Nov 17, 2012 2:54 PM
Author: Bob Ferreira
Subject: Re: Subtract values in a matrix
Daniel Gebhardt <gebhardt@cs.tu-berlin.de> wrote in message <20121117203903.4fb7f708@buero3>...

> "Bob Ferreira" <migmick2000@hotmail.com> schrieb am Sat, 17 Nov 2012 19:12:14 +0000 (UTC):

>

> > I have a matrix which has "L" lines and "C" columns. I want to subtract each value in the matrix by the [...] first value in the [...] line [...]

>

> > Example: m = [2,2,2;3,3,3;4,4,4] the matrix given should be [0,0,0;-1,-1,-1;-2,-2,-2]

>

> Hi,

>

> even so it might not scale well, and eventually fail on large matrices due to memory, it should work:

>

> (diag(m(1,:))*ones(size(m))-m')'

>

>

> Daniel

Thanks for your answer but it isnt going to work since the matriz Im using isnt square, so you end up multiplying matrices with different number of lines