Making a for-loop based on a condition for the third dimension of a 3D Array

Question

Filip Hansson 2022-8-18

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https://ww2.mathworks.cn/matlabcentral/answers/1781285-making-a-for-loop-based-on-a-condition-for-the-third-dimension-of-a-3d-array

评论： Filip Hansson 2022-8-18

I would like to include "a3" as a condition in the for-loop but cant get it to work. The final form of "AllaMatriser" should be a 24x365x60 where the change from the actuall for-loop should have affact only 30 out of the 60 sheets, where the other 30 would be left unchanged.

Thanks in advanced!

AntalObjekt = 60;                  
Procent = 0.5;                        
AntalLadd = fix(AntalObjekt*Procent); 
i =11;
b3 = 1:AntalObjekt;
a3 = randsample(b3, AntalLadd);
for i = i
        AllaMatriser(m_spotpris==1) = i; % Both AllaMatriser and m_spotpris are 24x365x60 matrices
end

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Answer 1

Jan 2022-8-18

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https://ww2.mathworks.cn/matlabcentral/answers/1781285-making-a-for-loop-based-on-a-condition-for-the-third-dimension-of-a-3d-array#answer_1028555

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Omit strange useless lines like "for i = i".

AntalObjekt = 60;                  
Procent     = 0.5;                        
AntalLadd   = fix(AntalObjekt*Procent); 
i  = 11;
a3 = randparm(AntalObjekt, AntalLadd);
match = false(size(m_spotpris));
match(:, :, a3) = (m_spotpris(:, :, a3) == 1);
AllaMatriser(match) = i;