Hi all

I have some ".mat" files. i want to display the frequency domain of them. I tried spectrum analyzer block in simulink. but it does not worked. so i tried to make ".txt" file of this blocks using this syntax:

" load(file.mat')

>> Conten=who;

>> save('file.txt',Conten{:},'-ascii')

after getting ".txt" file, i used following syntax to display frequency domain:

"signal=load('file.txt');

N=length(signal);

fs=256;

fnyquist=fs/2;

plot(abs(fft(signal)))

xlabel('frequency');

ylabel('magnitude')

title('Double-sided Magnitude Spectrum')

axis tight"

but i was not successful. can anybody help me please?!

i attached ".mat" file here.

regards

mohammadreza meindai