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Summation issue using loop
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I am trying to implement this summation in matlab but i do not know how ?
thank u
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Robert U
2019년 10월 20일
Hi Ali aaa,
in your code parts are missing. Without knowing any constraints about the variables, I suggest the following solution:
- Define a (local) function to solve the summation formula
- check input validity
- Try to vectorize the calculation
function [Em] = sum_mNi(x,m,N)
validateattributes(x,{'numeric'},{'vector','nonempty'});
validateattributes(m,{'numeric'},{'scalar','nonempty'});
validateattributes(N,{'numeric'},{'scalar','nonempty'});
Em = 1/N * sum(cell2mat(arrayfun(@(ind) x.^2 .* (m*N + ind),0:N-1,'UniformOutput',false)'),1);
end
The solution might be wrong, depending on the input value types.
Kind regards,
Robert
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