please help "Output argument ‹variable› (and maybe others) not assigned during call to ‹function›". I have attached the required files.

here is the function which is showing error %

 function [fr,f_i,f_l,f_a]=find_freqs (H,F)
 k=1;
 u=1;
 f_i=zeros(length(H),1);
for i = 1+u:length(H)-u
if H(i+u)<H(i)
if H(i-u)<H(i)
fr(k)=F(i);
f_i(i)=max(H);
f_l(k)=i;
f_a(k)=H(i);
k=k+1;
end
end
end

Answer 1

[Star Strider]

Ths usual reason for that error is that the if conditions are not satisfied, so in this instance the output arguments are never assigned. The easiest way to correct that is to always assign something to them, then overwrite that value (here NaN) if the conditions are met.

The Code:

function [fr,f_i,f_l,f_a]=find_freqs (H,F)
k=1;
u=1;
f_i=zeros(length(H),1);
for i = 1+u:length(H)-u
    fr(k)=NaN;
    f_i(i)=NaN;
    f_l(k)=NaN;
    f_a(k)=NaN;
    if H(i+u)<H(i)
        if H(i-u)<H(i)
            fr(k)=F(i);
            f_i(i)=max(H);
            f_l(k)=i;
            f_a(k)=H(i);
            k=k+1;
        end
    end
end

Note — I did not test the revised code, but it should work.