```Date: Nov 17, 2012 11:37 PM
Author: dpb
Subject: Re: Subtract values in a matrix

On 11/17/2012 1:45 PM, Bob Choy wrote:> dpb <none@non.net> wrote in message <k88ofr\$kd2\$1@speranza.aioe.org>...>> On 11/17/2012 1:12 PM, Bob Ferreira wrote:>> ...>>>> > 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]>> >>> > I hope I made myself understood, if not, please ask away.>> ...>>>> No clue how you got the result from the description, sorry...>>>> What term, specifically was subtracted from which and how did you get>> it to produce the desired result? (Actually, the answer to this may>> well provide you w/ the (or at least a) solution)....> Okay well, the values in the second line of the matrix becomes the> result of the first value of that column, minus the value that was there> before, and after that, all values in the first line become all zeros.>> So in the example, m = [0,0,0;(2-3),(2-3),(2-3);(2-4),(2-4),(2-4)]I still don't see how the column comes into and it's not clear to me which matrix is "the" matrix, sorry...I can get your answer via >> n=repmat([m(1,:)],size(m,1),1); >> n-mans =      0     0     0     -1    -1    -1     -2    -2    -2 >>Whether that's actually the result you want or not, I've no klew...--
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