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How to save inner loop data with outer loop data in one matfile

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fadams18
fadams18 10 Jan 2019
댓글: fadams18 11 Feb 2019
Hello Matlabers!
So basically i have this code
for i=1:5
r=5;
W = rand(m,r);
H = rand(r,n);
for rank=2:2:20 % Now for every value of rank I want to compute W0 and H0
W0 = rand(m,rank);
H0 = rand(rank,n);
end
% finally in the end I want to save all values. For each iteration of the OUTER loop,
% I will have all values of the INNER loop as well.
save( ['DATA/data_',int2str(i),'.mat'],'W','H','W0','H0','-v7.3' )
end
So i wish to have my matfile contain files like
Data_1
W,H
W0_2,W0_4,W0_6,...,W0_20
Data_2
W,H
W0_2,W0_4,W0_6,...,W0_20
.
.
Data_5
W,H
W0_2,W0_4,W0_6,...,W0_20

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Stephen Cobeldick
Stephen Cobeldick 10 Jan 2019
"W0_2,W0_4,W0_6,...,W0_20"
Avoid creating variables with dynamic variable names:
It is much simpler and much more efficient to use indexing.

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Stephen Cobeldick
Stephen Cobeldick 10 Jan 2019
편집: Stephen Cobeldick 10 Jan 2019
Using a structure (or any other array) is better than using dynamically named variables:
m = 2;
n = 3;
r = 5;
V = 2:2:20;
for ii = 1:5
W = rand(m,r);
H = rand(r,n);
S = struct();
for jj = 1:numel(V)
S(jj).W0 = rand(m,V(jj));
S(jj).H0 = rand(V(jj),n);
end
F = fullfile('DATA',sprintf('data_%d.mat',ii));
save(F,'W','H','S','V')
end

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fadams18
fadams18 10 Jan 2019
I Just appllied your idea. I am trying to load the files and you use them as input to my function NMF
function [] = runs(sNR,Mv,i,Tmax,passes)
matcontent = fullfile('DATA', sprintf('data_%d_%d_%d.mat',sNR,Mv,i));
load(matcontent,'Q','X','r','rank','W','H','W0', 'H0','V');
for combidx = 1:numel(W0) %try every combination
% index the cell arrays:
[~,~,RRE_NMF,T_NMF]=NMF(X,Q,matcontent.Winit{combidx}, matcontent.Hinit{combidx},Tmax,passes);
save( ['output/NMF_',int2str(sNR),'_',int2str(100*Mv),'_',int2str(rank),'_',int2str(i),'.mat'], 'RRE_NMF', 'T_NMF', '-v7.3' );
end
end
When i run it, i get this error
Dot indexing is not supported for variables of this type.

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