Matrix from triple loop

2 次查看（过去 30 天）
cniv_we
cniv_we 2016-9-28
评论： cniv_we 2016-9-28
I am trying to simplify the code from following loop:
for i = 1:10
for j = 11:20
RS_1(:,i) = signal(:,i) - signal(:,j);
end
for j = 21:30
RS_2(:,i) = signal(:,i) - signal(:,j);
end
for j = 31:40
RS_3(:,i) = signal(:,i) - signal(:,j);
end
for j = 41:50
RS_4(:,i) = signal(:,i) - signal(:,j);
end
RS = [RS_1 RS_2 RS_3 RS_4];
end
With this one:
for i = 1:10
for j = 11:50
for k = 1:40
RS(:,k) = signal(:,i) - signal(:,j);
end
end
end
I am wondering why do I get different matrix RS?

请先登录，再回答此问题。

采纳的回答

Massimo Zanetti
Massimo Zanetti 2016-9-28
It doesn't work because your are using the RS_n matrices in your second code. This is a simplification of the first code:
RS_1(:,1:10) = signal(:,1:10) - signal(:,11:20);
RS_2(:,1:10) = signal(:,1:10) - signal(:,21:30);
RS_3(:,1:10) = signal(:,1:10) - signal(:,31:40);
RS_4(:,1:10) = signal(:,1:10) - signal(:,41:50);
RS = [RS_1 RS_2 RS_3 RS_4];
  3 个评论
显示 1更早的评论
Massimo Zanetti
Massimo Zanetti 2016-9-28
Ah ok! simple like this:
for i=[11,21,31,41]
RS(:,i-10:i-1) = signal(:,1:10)-signal(:,k:k+9);
end
That's it.

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 Matrix Indexing 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