Looping through a 3D matrix

Question

Robert 2015-11-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/252901-looping-through-a-3d-matrix

评论： TastyPastry 2015-11-5

I have a 3D matrix 35,43,144

I want to run the following code such that it performs the function element by element through the 3rd dimension (using 144 data points) I want this to be done for every pixel giving me 1505 outputs (35x43)

I just can't seem to figure out the correct loop inputs

p = load ('JPLCSRmean.mat')
GRACE = p.datamean
ncol = size(GRACE,2);
for k = 1:144
j = 1:43
i = 1:35
[c,l] = wavedec(GRACE(i,j,k),4,'dmey');
al = appcoef(c,l,'dmey',1);
%[cD1,cD2,cD3,cD4,cD5,cD6] = detcoef(c,l,[1,2,3,4,5,6]);
D = [];
%D(:,6)= wrcoef('a',c,l,'dmey',6);
%D(:,5) = wrcoef('a',c,l,'dmey',5);
D(:,4) = wrcoef('a',c,l,'dmey',4);
D(:,3) = wrcoef('a',c,l,'dmey',3);
D(:,2) = wrcoef('a',c,l,'dmey',2);
D(:,1) = wrcoef('a',c,l,'dmey',1);
filename = sprintf('%s_%04f.txt', 'GRACE_APROXIMATIONS', k)
csvwrite(filename,D)
end

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Answer 1

TastyPastry 2015-11-4

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/252901-looping-through-a-3d-matrix#answer_198521

在 MATLAB Online 中打开

for i = 1:144
  for j = 1:43
    for k = 1:35
      myVal = myData(i,j,k);
      %do something
    end
  end
end

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Robert 2015-11-4

编辑：Robert 2015-11-4

在 MATLAB Online 中打开

Thanks, so now my code looks like this

p = load ('JPLCSRmean.mat')
GRACE = p.datamean
ncol = size(GRACE,2);
for i = 1:144
for j = 1:43
for k = 1:35
[c,l] = wavedec(GRACE(i,j,k),4,'dmey');
al = appcoef(c,l,'dmey',1);
%[cD1,cD2,cD3,cD4,cD5,cD6] = detcoef(c,l,[1,2,3,4,5,6]);
D = [];
%D(:,6)= wrcoef('a',c,l,'dmey',6);
%D(:,5) = wrcoef('a',c,l,'dmey',5);
D(:,4) = wrcoef('a',c,l,'dmey',4);
D(:,3) = wrcoef('a',c,l,'dmey',3);
D(:,2) = wrcoef('a',c,l,'dmey',2);
D(:,1) = wrcoef('a',c,l,'dmey',1);
filename = sprintf('%s_%04f.txt', 'GRACE_APROXIMATIONS', k)
csvwrite(filename,D)
end
end
end