About row and column swapping in a matrix

13 次查看（过去 30 天）
Mohammad
Mohammad 2015-7-22
评论： Rakib Seemanto 2020-11-1
Hi Guys. I have a question which probably could be easy or might have built in function but I kinda stuck on it. Attached is a 3x3 matrix as an image as appeared below. I want to swap the rows and columns as shown here and save each sequence of swapping. I have a very big file to handle, i have just shown a small sample here. I tried with a loop but could not get it working. I would greatly appreciate any efforts.
Thanks Rafiq

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2015-7-22
编辑：Star Strider 2015-7-22
I would just use circshift:
A = [0 1 2; 1 1.4 2.2; 2 2.2 2.8];
B = circshift(A, [-1 -1])
B =
1.4 2.2 1
2.2 2.8 2
1 2 0
  5 个评论
显示 3更早的评论
Rakib Seemanto
Rakib Seemanto 2020-11-1
how can I swap 6x6 matrix middle two rows.A = [ 1 2 3;4 5 6;7 8 9;10 11 12;13 14 15;16 17 18]
The output will be:B = [ 1 2 3;4 5 6;10 11 12;7 8 9;13 14 15;16 17 18]

请先登录，再进行评论。

更多回答（1 个）

Walter Roberson
Walter Roberson 2015-7-22
To swap column J with column K you would use
newArray = oldArray;
newArray(:,[K J]) = newArray(:,[J K]];
For swapping rows,
newArray([K J],:) = newArray([J K],:);
  1 个评论
Mohammad
Mohammad 2015-7-22
Thanks Walter. I actually used this technique and used a loop. The problem is when you swap the columns, all the columns are swapped and same with rows. If you look at my matrix, first I want to swap all the columns (top 3 matrix), then I want to swap first row with second row and swap all the columns (middle 3 matrix), and finally I want to swap row 2 with row 3 and swap all the columns again (the last three matrix). My loop is not working the way I want it. Thanks for looking into the problem. I appreciate it.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 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