Hi Wang,
The error occurs because 'wn' and 'hn_0' depend on 'N', a tunable parameter.
To resolve this issue,go to the Model Explorer and check the "Variable Size" box for 'wn' and 'hn_0'.
Initialize 'x' and 'y' outside the loop to ensure they are defined for all execution paths.
Also, ensure that the length of zeros being concatenated is greater than 0 based on your definition of 'hn_0'.
Refer to the following code for an example check:
% Ensure dimensions match for concatenation
if N > size_hn(2)
hn_0 = [hn, zeros(1, N - size_hn(2))];
else
hn_0 = hn;
end
This check is necessary because 'hn_0' is dependent on the tunable parameter 'N', which can lead to issues if 'N - size_hn(2)' is smaller than expected in various cases.
