i have a matrix like:A=[9 7 8 4 2 5 1 8 6 12]. i wanna add the first 5 elements .how can I do this?

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i have a matrix like:A=[9 7 8 4 2 5 1 8 6 12]. i wanna add the first 5 elements .how can I do this?

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Image Analyst
Image Analyst 2016-4-23
Try this:
sumFirst5 = sum(A(1:5));

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