Basic question about loops

6 次查看（过去 30 天）
Pelajar UM
Pelajar UM 2021-10-29
评论： Stephen23 2021-10-31
Very basic question: why is this not working?
instead of
Idx2=Idx(:,2)
Idx3=Idx(:,3)
Idx4=Idx(:,4)
Idx5=Idx(:,5)
I wrote
for i=2:5
Idx(i)=Idx(:,i)
end
The error is: Unable to perform assignment because the left and right sides have a different number of elements.
  10 个评论
显示 8更早的评论
Pelajar UM
Pelajar UM 2021-10-30
编辑：Pelajar UM 2021-10-31
Perfect! Thank you so much.
Small error: your code mixes k and i.
Stephen23
Stephen23 2021-10-31
"Small error: your code mixes k and i"
Fixed, thank you!
If the content of C are of suitable sizes then after the loop you could concatenate them back into one array, e.g.:
A = cat(3,C{:})

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

millercommamatt
millercommamatt 2021-10-29
You could make use of genvarname, but this would work too.
for i = 2:5
eval(['Idx' num2str(i) ' = Idx(:,' num2str(i) ');']);
end
When you start using functions like genvarname and eval, it's usually a sign that you should be approaching your task in a different way.
  4 个评论
显示 2更早的评论
Pelajar UM
Pelajar UM 2021-10-29
Wonderful. Thanks a lot.
Stephen23
Stephen23 2021-10-29
"Yes, this is exactly what I wanted"
and is a slow, complex, inefficient, obfuscated approach this task.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Logical 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