Creating a non-square diagonal matrix

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Nikan Fakhari
Nikan Fakhari 2020-12-17
评论： Nikan Fakhari 2020-12-17
Hi there,
I have a vector A that contains 2240 elements and I wanted to create a non-square diagonal matrix out if (B) that has the following dim: (94,037,2240),
I cant really use the diag function in matlab beause that gives me a square diagonal matrix,
Could you please help me with this issue?
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James Tursa
James Tursa 2020-12-17
OK, 94037x2240. But what is the rule?

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回答（2 个）

Bruno Luong
Bruno Luong 2020-12-17
B = diag(A(:));
B(94037,1) = 0;
Jan
Jan 2020-12-17
编辑：Jan 2020-12-17
s1 = 94037;
s2 = 2240;
v = rand(1, s2); % Test data
M = zeros(s1, s2);
M(1:s1+1:s1*s2) = v; % Linear indexing
Or if s2 > s1:
s1 = 2;
s2 = 4;
v = rand(1, s1); % Test data
M = zeros(s1, s2);
M(1:s1+1:s1*s1) = v; % Linear indexing

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