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Could anyone help me to fix the issue.

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jaah navi
jaah navi 2019-1-30
回答： KSSV 2019-1-30
code:
a=[1 2;
3 4;
5 6;
7 8]
data=2;
dimension=2;
a=a(:,1+data:dimension+data);
If i run this i am getting index exceeds matrix dimensions
could anyone explain what is meant by index exceeds matrix dimensions and how it can be solved with respect to the above code.

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KSSV
KSSV 2019-1-30
You have two columns in a ...but you are trying to extract four columns...so the error...
a=[1 2;
3 4;
5 6;
7 8]
a=a(:,1:2); % no error
a = a(:,2:4) ; % error

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