How to compute harmonic average on the blocks of an array?
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Hi,
I have attached the data Mmin, I want to compute the harmonic average of first 4 values and then next 4 and so on. In short in the blocky form and each block is of 4 values.
Just like shown in the attached figure. after taking harmonic mean of first four values, there will be one value instead of four and so on.
Can someone help me to write it code?
Thanks
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1100510/image.jpeg)
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Accepted Answer
David Hill
on 17 Aug 2022
a=randi(100,1,100);%some vector
for k=1:length(a)-3
A(k)=harmmean(a(k:k+3));
end
4 Comments
David Hill
on 18 Aug 2022
Edited: David Hill
on 18 Aug 2022
I misunderstood you. I thought you wanted a rolling harmonic mean 1-4 then 2-5, then 3-6, 4-7, etc. I simple change will correct.
a=randi(100,1,32);%some vector
c=1;
for k=1:4:length(a)-3
A(c)=harmmean(a(k:k+3));
c=c+1;
end
A
Or
m=movsum(1./a,4,'Endpoints','discard');
A=4./m(1:4:end)
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