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Re: digital differentiator using the
From: |
Riccardo Corradini |
Subject: |
Re: digital differentiator using the |
Date: |
Thu, 8 Feb 2007 12:12:47 +0100 (CET) |
remez function etc..
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Hi Ron,
I met a similar error runing a bfgs routine on a likelihood econometric
function for spatial models
error: invalid conversion from matrix to real vector ( i used growth rates
with lots of zeros)
Try to run your function with some values significantly different from zero,
and you will probably get rid of that errors.
I suggest to compile the last version of octave2.9.9 from cvs.
Just type sudo apt-get build-dep octave2.9, then
sudo apt-get install checkinstall
After downloading cvs octave see instructions on www.octave.org
type ./configure --prefix=/usr
make
sudo checkinstall
This will create the new kubuntu package octavew2.9.9.cvs and install it
Cheers
Riccardo
Ron Crummett <address@hidden> ha scritto: Hi -
I am trying to design a 4th order wideband differentiator using the
remez function. I type in
>>b = remez(4, [0 0.75], [0 0.75*pi], [], 'differentiator');
And I get this response:
error: invalid conversion from matrix to real vector
error: remez: need one weight for each band [=length(band)/2]
error: evaluating assignment expression near line 22, column 3
My only guess is that I need something in the weighting entry, so I
change it to
>> b = remez(4, [0 0.75], [0 0.75*pi], 1, 'differentiator');
Which gives me the message:
error: remez: griddensity is too low; must be greater than 16
error: evaluating assignment expression near line 22, column 3
A third attempt:
>> b = remez(4, [0 0.75], [0 0.75*pi], 1, 'differentiator', 64);
error: remez: incorrect argument list
error: evaluating assignment expression near line 22, column 3
At this point I am out of ideas of what I need to change. Has anyone
had any success with this? I am running 2.9.6 on Kubuntu breezy. Thanks.
-Ron
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Hi Ron,<br>I met a similar error runing a bfgs routine on a likelihood
econometric function for spatial models<br> error: invalid conversion from
matrix to real vector ( i used growth rates with lots of zeros)<br>Try to run
your function with some values significantly different from zero, and you will
probably get rid of that errors.<br>I suggest to compile the last version of
octave2.9.9 from cvs.<br>Just type sudo apt-get build-dep octave2.9,
then<br>sudo apt-get install checkinstall<br>After downloading cvs octave see
instructions on www.octave.org<br>type ./configure
--prefix=/usr<br>make<br>sudo checkinstall<br>This will create the new kubuntu
package octavew2.9.9.cvs and install it<br>Cheers <br>Riccardo<br><b><i>Ron
Crummett <address@hidden></i></b> ha scritto: Hi -<br><br>I am trying to
design a 4th order wideband differentiator using the <br>remez function. I
type in<br> >>b = remez(4, [0 0.75], [0 0.75*pi], [],
'differentiator');<br><br>And I get this response:<br> error: invalid
conversion from matrix to real vector<br> error: remez: need one weight for
each band [=length(band)/2]<br> error: evaluating assignment expression near
line 22, column 3<br> <br>My only guess is that I need something in the
weighting entry, so I <br>change it to<br> >> b = remez(4, [0 0.75],
[0 0.75*pi], 1, 'differentiator');<br><br>Which gives me the message:<br>
error: remez: griddensity is too low; must be greater than 16<br> error:
evaluating assignment expression near line 22, column 3<br><br>A third
attempt:<br> >> b = remez(4, [0 0.75], [0 0.75*pi], 1,
'differentiator', 64);<br> error: remez: incorrect argument list<br>
error: evaluating assignment expression near line 22, column 3<br><br>At this
point I am out of ideas of what I need to change. Has anyone <br>had any
success with this? I am running 2.9.6 on Kubuntu breezy.
Thanks.<br><br>-Ron<br><br>_______________________________________________<br>Help-octave
mailing
list<br>address@hidden<br>https://www.cae.wisc.edu/mailman/listinfo/help-octave<p> 
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