How to create matrices and change matrix names in a for loop (Sprint and Eval) ?

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ARS 2013-6-7

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采纳的回答： Iain

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Hi,

I have the following loop.

periods=28

*for z=1:periods   
       Period(z)Return{s,j}= open - close    
       FReturnLMS{s,k} = Period(z)Return{s,j} 
end;*

All loops are working except the z in * Period(z)Return{s,j}*. Please ignore s and j & k as they work fine. Only evaluating z is an issue. I am having trouble in deploying sprintf and eval.

Also please tell if there is a detailed source to understand the usage of Sprintf and eval.

All help will be appreciated.

Regards,

AMD.

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Answer 1

Iain 2013-6-7

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Period(z)Return{s,j} looks like a structure, but it seems to be missing the "." that would make it work. Period(z).Return{s,j}

eval simply evaluates the string you pass to it, as if it was entered at command line, in the current workspace.

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Iain 2013-6-7

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In light of your comment:

 for z=1:periods   
       eval(['Period' num2str(z) 'Return{s,j}= open - close;'])    
       eval(['FReturnLMS{s,k} = Period' num2str(z) 'Return{s,j};'])
 end

I would suggest that you consider just making it a 3D cell array {s,j,z}, or a cell array containing cell arrays {z}{s,j}

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Answer 2

ARS 2013-6-7

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Hi,

No, I wish to retain it as a cell array and thats why it ends with {}. I want the cell array name to be from Period1Return to Period28Return using loop and values assigned using