Creating a non-square diagonal matrix

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?

[James Tursa]

What is the rule for creating a 94x37x2240 array from a 2240 element vector?

[Nikan Fakhari]

its actaully 94,037 not 94 X 37, so the size im trying to make is a (94,037,2240) matrix

[Nikan Fakhari]

so the real question is that is there a way to make a non-zero diagonal matrix with a desired dimension in matlab?

[Nikan Fakhari]

sorry non-square I meant

[James Tursa]

OK, 94037x2240. But what is the rule?

Answer 1

[Bruno Luong]

B = diag(A(:));
B(94037,1) = 0;

[Nikan Fakhari]

Thank you

Answer 2

[Jan]

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

[Nikan Fakhari]

Thank you