Saving existing matrix

2011 4 19
1 个回答
回答已采纳
6 次查看（30 天）

0 个投票

Hi,
I would like to find a way to tell my code that if at the end of the loop the matrix 'P' exists then to save it, if not to continue the loop. I wrote that:
z=exist('P','var')
if z>0
save
end
It is wroking but, is it a good way to write it?
Cheers

请先登录，再回答此问题。

 采纳的回答

Matt Fig
Matt Fig 2011-4-19

0 个投票

Why would P exist sometimes and not others? If it is created somewhere in the loop, presumably an IF statement or other such branch, why not just save it there? Since your saved variable will be overwritten each time through the loop (that P exists), why not save after the loop?

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Nicolas
Nicolas 2011-4-19
basically, I'm studying a lot of data with the same range of parameters (i have 3 nested loops). For some data and some parameters P doesn't exist, while for the same data and different parameters P exists.
I'm saving P outside the loop (as you mentionned) and each time it is saved like P-1-1, then P-1-2 and so on.
basically I'm trying to make my matlab writting a bit better, and i try to avoid "if" or "for" when not necessary, to make my code more efficient.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by