Re: using gnuplot 4.2

[Søren Hauberg]

Hi,
  You need to figure out where gnuplot 4.2 is installed. Then in octave 
you can write

  gnuplot_binary("/usr/local/bin/gnuplot")

if you have installed gnuplot 4.2 in /usr/local/bin. If you need to do 
this every time you start octave, you can put the code in the file 
~/.octaverc. Everything in this file will be executed when you start octave.

søren

Ares skrev:
> 2007/7/27, LUK ShunTim <address@hidden>:
> > Ares wrote:
> > > 2007/7/27, LUK ShunTim <address@hidden>:
> > > > Ares wrote:
> > > > > Hi all,
> > > > >
> > > > > I am a new (happy) GNU/Linux user. I have kubuntu 7.04 installed with octave 2.9
> > > > >
> > > > > by default kubuntu package manager installs gnuplot version 4.0. now I
> > > > > found on octave help that octave can use gnuplot 4.2 to show images
> > > > > and plot data on top of such images (that is what I need) using
> > > > > gnuplot.
> > > > >
> > > > > My problem is: how can I tell octave to use gnuplot 4.2 instead of 4.0?
> > > > >
> > > > > I tried removing gnuplot 4.0 but (of course) octave does not find
> > > > > gnuplot anymore.
> > > > >
> > > > > thanks in advance for your help. Regards
> > > > Did you install gnuplot 4.2 via a deb package? If it's the case, the
> > > > easiest way is probably the debian alternatives mechanism. Try "man
> > > > update-alternatives" to see how to do it or install galternatives for a
> > > > GUI to do the same.
> > > >
> > > > For standalone install, you can try setting the binary search path so
> > > > that octave finds gnuplot 4.2 first. You may have to copy/rename the
> > > > binary to gnuplot if it's called gnuplot-4.2 or something.
> > > >
> > > > For bash,
> > > >
> > > > export PATH=/path/to/your/gnuplot/binary/dir:$PATH
> > > >
> > > > Regards,
> > > > ST
> > > > --
> > > as I said I am quite new to Linux, so I do not really understand all
> > > you are saying...
> > >
> > > anyway, I searched for gnuplot bin files and there are two of them,
> > > /usr/bin/gnuplot and /usr/local/bin/gnuplot, the first corresponds to
> > > gnuplot 4.0 and the second to 4.2. If I simply type gnuplot, it opens
> > > gnuplot 4.2, so this should already be prior to 4.0 (and octave should
> > > use this instead?)
> > In this case, gnuplot 4.2 should be found first. I don't think octave
> > hard-coded the path. Perhaps more knowledgeable users can confirm.
> >
> > Just to be sure, what does "echo $PATH" show? Is /usr/local/bin in front
> > of /usr/bin?
>
> yes it is.
>
>
> > > I also tried galternatives (don't have time to do it by command line!)
> > > and gnuplot is not there at all!
> > I guess your gnuplot 4.2 is not installed via dpkg or apt.
>
> no, I downloaded the package and installed it "by hand"...
>
> > > I think that the problem is "how to tell octave to use 4.2 version of
> > > gnuplot"? and also, how to tell which version of gnuplot octave is
> > > using? and is it true that octave is supposed to call gnuplot 4.2 to
> > > show images (and plot on top of them)?
> > >
> > > If I use imshow, octave keeps on using image magick...
> > Because somehow octave failed to find gnuplot 4.2 and hence it tries
> > other viewers. See "help imshow".
>
> unfortunately help imshow doesn't tell me anything about the viewer
> used by imshow...
>
> > > Regards,
> > Regards,
> > ST
> > --