simulink matlab function code error?

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Sandeep Kumar
Sandeep Kumar 2015-11-30
评论： Walter Roberson 2015-12-2
hello every one , i have been tring to implement calculating twiddle factors in matlab editor using "function", my code is working fine , the same thing i am implementing in the matlab function block in simulink its not working please kindly help, my code in matlab function block is
function y = twiddles_12345(u)
fft_length = input('u');
for mm = 0:1:(fft_length-1)
theta = (-2*pi*mm*1/fft_length);
twiddle(mm+1) = cos(theta) + (1i*(sin(theta)));
y = real(twiddle);
y = y'
end

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回答（1 个）

Walter Roberson
Walter Roberson 2015-11-30
Before the loop use
twiddle = complex(zeros(1,fft_length), zeros(1,fft_length));
In the loop you might need
twiddle(mm+1) = complex(cos(theta), sin(theta));
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Walter Roberson
Walter Roberson 2015-12-2
The
y = real(twiddle);
y = y'
should not be inside the loop.

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