Re: image, imshow and similar display empty axes

[edmund ronald]

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octave:1> graphics_toolkit gnuplot

octave:2> setenv GNUTERM qt

octave:3>  img = uint8 (round (255 * rand (5,4,3)));

octave:4> image (img)

Unknown or ambiguous terminal name 'qt'

gnuplot> set terminal qt 

                      ^

         line 0: unknown or ambiguous terminal type; type just 'set terminal' for a list

octave:5> set terminal

error: invalid conversion from string to real N-d array

error: set: expecting graphics handle as first argument

octave:5> 

On Wed, Nov 7, 2012 at 1:35 AM, Ben Abbott <address@hidden> wrote:

On Nov 6, 2012, at 6:16 PM, edmund ronald wrote:

> I installed MacPorts octave-develon Mac 10.6.8 in order to be able to use the
> Image processing toolbox.
> I downloaded the Gnuplot from the Macsyma sourceforge archive, but also
> built one using the universla variant from Macports because my system was
> crashing.
>
> I can plot nicely from Octave with both X11 and Aquaterm.
> I can do Imread, and do Imshow to X11
> Imshow to Aquaterm brings up a blank window.
>
> If I may be allowed an aside to the maintainers of the "packaged" octave,
> compiling a version which cannot load in the image toolbox is not a smart
> move.  It took me some time to figure out the workaround of compiling
> Octave-devel

What do you refer to by "packaged" octave ?

What didin't work with regards to the image toolbox?

Regarding the blank AquaTerm image, a bug report has been filed with Gnuplot.

        http://sourceforge.net/tracker/?func=detail&aid=3583459&group_id=2055&atid=102055

The Gnuplot provided by MacPorts includes a Qt terminal.  You may be happier with qt than with x11.

        graphics_toolkit gnuplot
        setenv GNUTERM qt
        img = uint8 (round (255 * rand (5,4,3)));
        image (img)

Ben