Creating a submatrix from a matrix
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I have a matrix for example; A = {1 3 7; 10 1 2; 11 5 9; 12 2 5] (however, mine is much bigger) And I would like to keep the rows where all the elements in the row are less than or equal to 7 to put into a new submatrix called B. How would I go about this?
Many thanks for any help you can give :)
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A = [1 3 7; 10 1 2; 11 5 9; 12 2 5]
your_mat = A(all(A<=7,2),:);
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更多回答（3 个）
A = [1 3 7; 10 1 2; 11 5 9; 12 2 5]
out=A(find(sum(A<=7,2)==size(A,2)),:) % rows with elements <=7
Azzi Abdelmalek
2013-1-8
编辑：Azzi Abdelmalek
2013-1-8
A = {1 3 7; 10 1 2; 11 5 9; 12 2 5};
B=cell2mat(A);
out1=B(B<7);
n=numel(out1);
n1=floor(sqrt(n));
m1=ceil(n/n1);
out=cell(1,n1*m1);
out(1:n)=num2cell(out1)';
B=reshape(out,n1,m1)
nabin
2014-5-8
0 个投票
I have a matrix A=[1 2 3; 1 2 9; 2 3 4]. I want a matrix B whose column 1 is equal to 1. How can I do this? B=[1 2 3; 1 2 9]
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