generating a matrix question
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i want to generate a matrix that each element is the sum of its row and column ive tried usin the henkel command but it didnt work is there an alternative or more simple solution thx
采纳的回答
Azzi Abdelmalek
2013-12-11
A=zeros(3,4);
[ii,jj]=ind2sub(size(A),1:numel(A));
A(1:end)=sum([ii' jj'],2)
3 个评论
mohamed
2013-12-11
Azzi Abdelmalek
2013-12-11
A=[20 4;3 5]
numel(A) % is number of element in A
ans=
4
A(1)
A(2)
A(3)
A(4)
1,2,3 and 4 are linear indices. to get subscripts use ind2sub
ii=[1 2 1 2] rows N°
jj=[1 1 2 2] column N°
Look at
doc numel
doc ind2sub
mohamed
2013-12-12
更多回答（1 个）
Andrei Bobrov
2013-12-11
编辑：Andrei Bobrov
2013-12-11
s = [3 4];% let s - size new matrices
A = hankel(2:s(1)+1,s(1)+1:sum(s));
or
A = bsxfun(@plus,(1:s(1))',1:s(2));
or
s = [3 4];
[ii,jj] = ndgrid(1:s(1),1:s(2));
A = ii + jj;
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