How to speed the code? It does not want to end processing!!!!

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Ahmed Gharieb naga
Ahmed Gharieb naga 2023-6-28
评论： Image Analyst 2023-6-29
Ran in:
R = length(lambda) ;
Unrecognized function or variable 'lambda'.
T = size(X,2) ;
time_dmd = zeros(T-1,R);
for iter = 1:T-1
for p = 1:R
time_dmd(iter,p) = b(p)*(exp(omega(p)*t(iter)));
Xdm(:,iter,p) = real(Phi(:,p)*(b(p).*exp(omega(p)*t(iter))));
end
end
  1 个评论
DGM
DGM 2023-6-29
编辑：DGM 2023-6-29
Well I can see a few obvious problems, but the most obvious problem is that that this isn't even complete code.
It's a bit hard to troubleshoot something If it's unknown what size anything is or if the code even works.

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回答（1 个）

DGM
DGM 2023-6-29
编辑：DGM 2023-6-29
Here's my guess.
% assuming b,omega,t are all row vectors
% width of Phi is equal to length of b,omega
time_dmd = b.*exp(omega.*reshape(t(1:end-1),[],1))
Xdm = permute(Phi,[3 2 1]).*time_dmd;
Xdm = real(permute(Xdm,[3 1 2]));
  2 个评论
Steven Lord
Steven Lord 2023-6-29
Ran in:
What is the size and class of the variable x that you load from your MAT-file? You can display this information using the whos function.
x = magic(4);
whos x
Name Size Bytes Class Attributes x 4x4 128 double

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