# Conversion of Matrix dimensions

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Fayyaz on 17 May 2015
Commented: Star Strider on 17 May 2015
Hi
I have a matrix 81 by 81 i.e.
1 2 . . 81
1 a1,1 a1,2 a1,81
.
.
81 a81,1 a81,81
I need to convert it to a matrix of order 6561 (81*81) by 2 i.e.
1=a1,1
2=a1,2
. .
81=a81,81
Any help in this regard would be greatly appreciated. Thanks in advance.
Fayyaz on 17 May 2015
Fayyaz on 17 May 2015
Thanks all for your comments. Problem has been solved. :)

Star Strider on 17 May 2015
Edited: Star Strider on 17 May 2015
If ‘A’ is your matrix, either use the reshape function:
Av = reshape(A, [], 1);
or simply use the vector default:
Av = A(:);
EDIT — I didn’t see the repeating indices in the first column. To create them, use the repmat function:
Ix = repmat(1:81, 1, 81)';
##### 2 CommentsShow NoneHide None
Fayyaz on 17 May 2015
Both of them are OK. thanks :)
Star Strider on 17 May 2015
My pleasure!

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