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Getting error using syms to implement power formula

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Giggs B.
Giggs B. 2021년 6월 28일
댓글: Giggs B. 2021년 6월 30일
I am trying to implement the power formula which is in the attached image.
I have written my code like this:
syms N; %Power formula
syms fs_sym;
syms x_hsym;
syms n;
syms f1;
syms f;
syms Power;
%f= (1/(2*N+1))*symsum((abs(x_h(n))),n,-N,N);
f= (1/(2*N+1))*f1;
This code is in continuation with some more code. So x_h along with other variabes were double, so I changed all of them to symbolic variales. But I am getting error:
Error using sym/subsindex (line 814)
Invalid indexing or function definition. Indexing must follow MATLAB indexing. Function arguments must be symbolic variables, and
function body must be sym expression.
Error in sym/subsref (line 859)
R_tilde = builtin('subsref',L_tilde,Idx);
Error in BestAlgorithmDetection (line 97)
I tried a couple of things, but cannot fix it. Can anyone help or provide a better way to implement the avove formula?

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Alan Stevens
Alan Stevens 2021년 6월 28일
Like this?
% Arbitrary values - replace with your own
fs = 1;
x_h = @(n) 1/(n+10)^2;
%Power formula
syms N fs_sym x_hsym n f Power;
f= (1/(2*N+1))*symsum((abs(x_h(n))),n,[-N,N]);
  댓글 수: 17
Giggs B.
Giggs B. 2021년 6월 30일
@Paul yes, I got that. Thanks :)

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