How to Rectify the "index must be a positive integer or logical" Error in my code?

2012 12 14
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Hi....Everybody... How are you?
??? Attempted to access dompol1(-1,:); index must be a positive integer or logical.
Error in ==> DEIMGC at 12 D1=dompol1(fraco(4),:);
Error in ==> VQWTVARWTQT at 486 [cimg1g]=deimgc(vqcode7g,dompool3g,gsize,scale);
This is Error in my code? How to correct that Error in my code.
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Matt J
Matt J 2012-12-14
编辑：Matt J 2012-12-14

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Stop using negative numbers to index an array, like -1 in the following
dompol1(-1,:)
It doesn't correspond to any array location.

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PRIYANGA
PRIYANGA 2012-12-14
编辑：PRIYANGA 2012-12-14
ok Sir.
But, how to convert the value negative to positive and pass that value through the function?
I have to calculate the vqcode7r,vqcode7g,vqcode7b values.. the result of the R G B any one is contain the negative value. how to stop the negative values occur in the calculation.

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