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Writing a code for taking averaging at a point

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Mayowa
Mayowa 2014-11-5
回答： per isakson 2014-11-6
I have vector of 100x1. Say 1-100. I want to take average at a particular point say 40. I want the average to be done in such a way that it will take 20 values on top and below 40 and add 40 itself making a total of 41 of sample. How can I write a code for this on matlab?

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per isakson
per isakson 2014-11-6
Run
vec = transpose(1:100);
ix = 40;
rng = 20;
avg = mean( vec( ix-rng : ix+rng ) );
and
>> avg
avg =
40

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