Re: octave windows 2.9.12-3 Question

[helloman]

Thanks for your reply. I got rid of the first problem. But I am still having
problems with the specgram. I am attaching the image that I am getting.

Is there any way to find out the gnuplot version installed with my octave.

If I run the specgram command again, I am getting an error. 

---------------------------------------------------------------------------------
octave:1> x=chirp([0:.001:2],0,1,150);
octave:2> specgram(x,256,1e3,256,250); % I am getting the attached
screenshot.
octave:3> specgram(x,256,1e3,256,250);

gnuplot> set palette file "-" binary record=64 using 1:2:3:4;
                                                            ^
         line 0: Gray scale not sorted in gradient.
---------------------------------------------------------------------------------

Gopi


David Bateman-3 wrote:
> 
> helloman wrote:
>> I have installed Batemans compiled octave 2.9.12 for windows. I have
>> selected
>> all the packages in the options. I have 3 questions on the octave. I am
>> very
>> recent to octave, so please bear me if its a silly question.
>> 
>> 1. When I am trying to use -> pkg load all, I am getting this warning. is
>> there any way to get rid of this warning.
> 
> "pkg load all" is probably a bad idea if you have all the packages
> install. The reason is packages like NaN change the default behavior of
> many basic Octave function. So if you don't want this behavior you
> shouldn't load these packages.. By default many of the packages are
> already loaded at start (see "pkg list" and look for the "*")
> 
>> -----------------------------------------------------------------------
>> 'which' is not recognized as an internal or external command,
>> operable program or batch file.
>> gmsh does not seem to be present some functionalities will be disabled
>> 'which' is not recognized as an internal or external command,
>> operable program or batch file.
>> dx does not seem to be present some functionalities will be disabled
>> -----------------------------------------------------------------------
>> 
> 
> Ok, this is a bug in the secs2d package, in that it assumes that "which"
> is available. I checked in a fix for this bug, but I suspect that
> Michael didn't include them. You can get windows binaries at
> 
> http://www.geuz.org/gmsh
> http://www.opendx.org
> 
> Though opendx needs an OpenGL capable X-windows, and that might be a
> problem for a Windows platform..
> 
>> 2. x=chirp([0:0.001:2],0,2,500);
>> specgram(x,128,1000,100,80) 
>> This command is not giving me the full spectrum. The spectrum by default
>> is
>> in gray. Is there a way to change it to RGB.
>> 
> 
> This seems to be working correctly. I took the example
> 
> t = 0:0.001:2;              % 2 secs @ 1kHz sample rate
> y = chirp(t,0,1,150);       % Start @ DC, cross 150Hz at t=1 sec
> specgram(y,256,1e3,256,250)
> 
> from the webpage
> 
> http://www.mathworks.com/access/helpdesk/help/toolbox/signal/
> 
> and it produced the same image. Note the axes are incorrect as specgram
> currently doesn't pass the axes to imagesc.. I applied a patch to
> octave-forge to correct this.
> 
> 
>> 3. Is it possible to update the gnuplot from 4.0 to 4.2. Is 4.2 stable? 
> 
> It does have gnuplot 4.2..
> 
> 
> D.
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> 
> 
http://www.nabble.com/file/p11318946/spec.jpg 
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