matlab hanging for the below code

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Fs=10
t=0:1/Fs:1
x1=cos(2*pi*t*3)+cos(2*pi*t*4)+cos(2*pi*t*8)+cos(2*pi*t*10)
fft_x1=fft(x1)
fft_shift=fftshift(fft_x1)
mag=abs(fft_shift)
N=length(t)
f=-Fs/2:Fs/N:Fs/2-(Fs/N)
stem(f,mag)
fr=[]
for k=1:N
sum=0
for n=1:N
out=x1(n)*exp((-i*pi*2*n*k)/N)
sum=sum+out
end
fr=[fr sum]
end
fr=fftshift(fr)
mag1=abs(fr)
plot(t,x1)
title('signal time')
stem(f,mag1)
for this code matlab is hanging ,but for other programs matlab is working fine what is the problem in the code

Accepted Answer

Image Analyst
Image Analyst on 3 Dec 2019
It doesn't hang for me.
But you should not use the name "sum" for your variable since it's the name of a very important built-in function that you will overwrite.
  4 Comments
Shashidhar Kudari
Shashidhar Kudari on 4 Dec 2019
if we overwrite the inbuilt function ,then how should we correct that?
whether it gets corrected on restart of matlab?
Walter Roberson
Walter Roberson on 4 Dec 2019
You can clear followed by the name of the function.
Exception: if what you overwrote was clear itself, then
builtin('clear', 'clear')
If you ovewrote builtin and clear then you need the special behaviour
builtin clear clear
This will, as a special case, not invoke
builtin('clear', 'clear')
where builtin in the above line refers to whatever you overwrote builtin with.

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More Answers (1)

Raj
Raj on 3 Dec 2019
Doesn't seem to be hanging for me!
Capture.JPG
Where are you having problem? Have you tried running in Debug mode?

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