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## Re: Quick Question About Signal Processing

 From: Ahmed Husain ?Abbas Mohamed Sahrab Subject: Re: Quick Question About Signal Processing Date: Fri, 11 Nov 2016 16:14:17 +0000

it's a 42k X 2 vector, I'm having a rather difficult time using octave, sometimes it gets the data from the audio file and sometimes it's just rows of zeros.

I tried your command to no avail

Best Wishes

Ahmed Suhrab

Sent: Friday, November 11, 2016 6:49:21 PM
To: Ahmed Husain ?Abbas Mohamed Sahrab
Subject: Re: Quick Question About Signal Processing

On Fri, Nov 11, 2016 at 8:55 AM, Ahmed Husain ?Abbas Mohamed Sahrab wrote:

Dear Esteemed Volunteers.

I have a question about incorporating a piece of code into my project.

I have found this piece of code online

```   Fs = 1000;
t = 0:1/Fs:1-1/Fs;
x = cos(2*pi*100*t)+randn(size(t));
[Pxx,F] = periodogram(x,[],length(x),Fs);
plot(F,10*log10(Pxx))```

and I would like to use the wavread command and use that signal in place of the Fs,t and x. So, I wrote this bit of code

NFFT=input("Choose a fraze size of either 128, 256 and 512. ");
[Pxx,F] = periodogram(y,[],NFFT,fs);
plot(F,10*log10(Pxx))

But I am sad to report this it is not working, and that I am receiving this error

⹏፥error: periodogram: X must be a real or complex vector

what is the dimension of y?
It might have 2 col.

If it does then try y(:,1)

If you can help me I would appreciate it immensely

With Love,

Ahmed Suhrab

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