清空筛选条件
清空筛选条件

compare index 1 to index s within loop. index exceed matrix dim

1 次查看（过去 30 天）
Leyon
Leyon 2013-11-11
评论： Walter Roberson 2013-11-12
I have 12 files (M) each with 12 columns to which I want to compare each file columns to another file columns.
for s =1:numel(M)
if all(strcmpi(M(1),M(s))) == 1
M = M(s);
end
end
However, I am getting index exceed matrix dimension. Any help as to how to improve this loop would be nice.
  4 个评论
显示 2更早的评论
Leyon
Leyon 2013-11-12
I need an all because any() says that the two matrices can have specific columns that are equal. I need all the columns to be equal across all the matrices

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2013-11-11
The first time the test succeeds, you are going to replace your array M with the single element M(s) . That leaves M as only a single element long, so the next iteration of the loop attempting to index it by anything other than 1 is going to fail.
  4 个评论
显示 2更早的评论
Leyon
Leyon 2013-11-12
As before, how would I be able to compare the columns in the matrices?
Walter Roberson
Walter Roberson 2013-11-12
You are doing an approximation of comparing columns. But when you find a match, you are overwriting the M array and then attempting to continue matching. Perhaps you want something more like,
M_target = M(false); %copies the type but an empty matrix
for s =1:numel(M)
if all(strcmpi(M(1),M(s))) == 1
M_target = M(s);
end
end

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 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