How to change matrix dimensions?
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Hi,
I have a question regarding a 3D matrix with portfolio returns.
I have a 10000x35x12, which is 10000 simulated return paths for 35 years and 12 months in each year. Now I want to make this a 2D matrix with dimensions 10000x420 (35x12) such that the 420 months of return are in the right order. Can somebody help me with that?
Thanks in advance!
Greetz
回答（4 个）
Andrei Bobrov
2012-12-6
M - your 3D array with size < 10000,35,12 >
out = reshape(permute(M, [1 3 2]),size(M,1),[]);
Muruganandham Subramanian
2012-12-6
try this:
a=zeros(1000,35,12);
b=reshape(a,[1000 420]);
Azzi Abdelmalek
2012-12-6
[n,m,p]=size(A)
b=reshape(A,n,p*m)
idx=reshape(1:p*m,m,p)'
out=b(:,idx(:))
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