Re: image, imshow and similar display empty axes

[Ben Abbott]

*** Please "reply-all" and respond at the bottom of the email ***

On Nov 2, 2012, at 5:16 AM, Jan-Timm Kuhr wrote:

> On 31.10.2012, at 22:02, Ben Abbott wrote:
> 
>> On Oct 31, 2012, at 3:15 PM, Jan-Timm Kuhr wrote:
>> 
>>> Hello,
>>> I'm working on with octave 3.6.3. on a Mac.
>>> When I try to plot a 2D image, say by using image(rand(10)), I get an 
>>> correct set of axes, but filled with with white space instead.
>>> 1d plots seem to work alright.
>>> I suspect that it has something to do with working on a Mac.
>>> I found this here https://savannah.gnu.org/bugs/?29522
>>> but it links to another thread, which is rather cryptic, at least to me.
>>> Thanks a lot for any help,
>>> jan
>> 
>> If you try ...
>> 
>>      h = image (rand (10))
>>      set (h, "cdatamapping", "scaled")
>> 
>> ... do you get what you expect?
>> 
>> If so, you can try "imagesc()" instead of "image()"
>> 
>> Ben
> 
> Thanks Ben but it does not seem to have anything to do with the scaling of 
> the color map.
> Best,
> Jan


With Octave 3.6.3 from Fink on MacOS 10.6.8 using Gnuplot 4.6 patchlevel 0 and 
AquaTerm v1.0.1.

The command  image(rand(10)) produces a solid navy blue image. 
imagesc(rand(10)) produces random colors.

I'm get the same result using Octave 3.4.0 from MacPorts (on MacOS 10.7.5 with 
Gnuplot 4.6 patchlevel 1 and AquaTerm v1.1.1).

Where did you get your Octave, Gnuplot and AquaTerm?  And what version of MacOS 
are you running?

Ben