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Re: undefined "usagestr" in function Pwelch


From: Paul Kienzle
Subject: Re: undefined "usagestr" in function Pwelch
Date: Thu, 12 Sep 2002 22:33:09 -0400

On Thu, Sep 12, 2002 at 05:20:24PM -0600, Ajay Singh wrote:
> I am trying to calculate the power spectrum using the Pwelch function.
> I call the function with following arguments:
> [Pxx,Pci,w]=pwelch(y1,8192,2E6,[],[],[],'whole',[],'linear')
> 8192: no of data points
> sampling time =0.5 microseonds and hence, sample frequency:2MHz
> 
> It returns me following error
> 
> `usagestr' undefined near line 144 column 13

Thanks for the report. 

> 
> "usagestr" is not an user difined arguement for pwelch, so how can I
> define it? Or what could be  the reason for this error?

Try dropping the extra []'s.  The numbers are interpreted in positional
order: x, nfft, Fs, window, overlap, ci.  There are six of them, and you
have have seven arguments that aren't strings.
The strings are interpreted in any order.  

> 
> Thanks for the help
> 
> Ajay
> 
> 
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> 
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Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
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