Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


dpb
Posts:
9,850
Registered:
6/7/07


Re: problem with matrix
Posted:
Apr 8, 2013 10:56 AM


On 4/8/2013 8:44 AM, Bruno Luong wrote: > dpb <none@non.net> wrote in message <kjuger$mqe$1@speranza.aioe.org>... >> On 4/8/2013 8:22 AM, zack00 wrote: > >> >> Probably better than actually shifting columns would be to simply keep >> a pointer to the next column to use modulo Ncols instead. >> > > Why it is better? > Whereas the array is rearranged later with modulo, or at the begining > without, the data in the memory get moved by the same amount.
Why does he ever _need_ to rearrange memory at all? All he needs is the pointer to and use the desired column(s).




