How do you convert an array into a square matrix?

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Mike
Mike 2012-9-29
Say I have an array
x=[1 2 3 4 5 6 7 8 9 10]
and I want to convert this into a square matrix as follows:
M=
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10...
And so on so that there are a total of 10 rows and 10 columns
So I start with a [1x10]array and turn this into a [10x10] matrix
How do you do this??
Thank you!
MC
  1 个评论
Matt J
Matt J 2012-9-29
It's often possible to avoid replicating data (and also desirable for memory-efficiency reasons) using the BSXFUN command. You should elaborate on why you think you need the rows replicated.

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采纳的回答

Wayne King
Wayne King 2012-9-29
编辑：Wayne King 2012-9-29
x = [1 2 3 4 5 6 7 8 9 10];
x = repmat(x,10,1);

更多回答（2 个）

Matt Fig
Matt Fig 2012-9-29
编辑：Matt Fig 2012-9-29
Another:
x = 1:10; % Original
x = x(ones(1,length(x)),:) % indexing instead of repmatting.
Andrei Bobrov
Andrei Bobrov 2012-9-30
M = ones(numel(x),1)*x;
M = bsxfun(@plus,x,zeros(numel(x),1));

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