select part vector put it back in other vector

Dear all,

I want to select the 16th data point from a vector with the 15 points before and after that 16th point. I want to calculate the mean of it and put it back into a new vector. This does also mean that we can start from our 16th value and that the first 15 points should be skipped.

Thanks

[Kevin Chng]

I'm not sure what you are try to do. But take a look at code below

I = [ 1 2 3 4  6 7]

if let say i want to count the mean of 3th to 5th , then replace them by the mean value

s = 3
e = 5

I = [I(1:s-1) mean(I(s:e)) I(e+1:end)]

provided s>1, e<end

[Kjell Lemmen]

Dear Kevin,

I have to the remove outliers to be exactly. I have to calculate the outlier by 3 times the std from the mean. If the 16th value is lower or higher then these 3 times the std difference from the mean that value should be NaN. I do have to calculate the mean and std over a window of 30 points, 15 before that specific value and the 15 points after.

Sorry I was a bit confusing to be honest.

Answer 1

[madhan ravi]

S=1:20 %an example
datas=mean([S(1:15) S(17:20)]) %skips 15th element of S vector and calculates its mean

Answer 2

[Andrei Bobrov]

S(S./movmean(S,31) >= 3) = NaN;