dpb
Posts:
8,361
Registered:
6/7/07


Re: Subtract values in a matrix
Posted:
Nov 17, 2012 11:37 PM


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;(23),(23),(23);(24),(24),(24)]
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); >> nm ans = 0 0 0 1 1 1 2 2 2 >>
Whether that's actually the result you want or not, I've no klew...


