Re: [Matplotlib-users] imlim in ax.imshow

[Benjamin R. <ben...@ou...>]

On Tue, Oct 2, 2012 at 3:07 PM, K.-Michael Aye <kmi...@gm...>wrote:

>
> On Oct 2, 2012, at 12:06 PM, Damon McDougall <dam...@gm...>
> wrote:
>
> > On Tue, Oct 2, 2012 at 8:00 PM, K.-Michael Aye <kmi...@gm...>
> wrote:
> >>
> >> On Oct 2, 2012, at 11:09 AM, Damon McDougall <dam...@gm...>
> wrote:
> >>
> >>> On Tue, Oct 2, 2012 at 5:51 PM, K.-Michael Aye <kmi...@gm...>
> wrote:
> >>>>
> >>>>
> >>>> On Oct 2, 2012, at 6:33 AM, Damon McDougall <
> dam...@gm...> wrote:
> >>>>
> >>>>> On Tue, Oct 2, 2012 at 2:19 PM, Benjamin Root <ben...@ou...>
> wrote:
> >>>>>>
> >>>>>>
> >>>>>> On Mon, Oct 1, 2012 at 7:20 PM, Michael Aye <kmi...@gm...>
> wrote:
> >>>>>>>
> >>>>>>> Hi!
> >>>>>>>
> >>>>>>> I see that the function ax.imshow takes the parameter 'imlim' but
> in
> >>>>>>> the source (status: EPD 7.3-2) it is not being used?
> >>>>>>> So what is it for?
> >>>>>>>
> >>>>>>> Best regards,
> >>>>>>> Michael
> >>>>>>>
> >>>>>>>
> >>>>>>
> >>>>>> Confirmed.  I don't see imlim anywhere except in the imshow()
> signature.  I
> >>>>>> have no recollection of this parameter, so it might be from before
> my time.
> >>>>>>
> >>>>>> Ben Root
> >>>>>
> >>>>> Is there some functionality you were looking for or were you just
> >>>>> exploring the codebase?
> >>>>>
> >>>> How nice of you to ask! ;)
> >>>> Indeed: I had the case that image arrays inside an ImageGrid where
> shown with some white overhead area around, e.g. for an image of 100 pixels
> on the x-axis, the imshow resulted in an x-axis that went from -10 to 110.
> I was looking for a simple way to suppress that behavior and let imshow
> instead use the exact image extent. I believe that the plot command has
> such a flag, hasn't it? (I.e. to use the exact xdata range and not try to
> beautify the plot?
> >>>>
> >>>> Michael
> >>>>
> >>>>
> >>>>> --
> >>>>> Damon McDougall
> >>>>> http://www.damon-is-a-geek.com
> >>>>> B2.39
> >>>>> Mathematics Institute
> >>>>> University of Warwick
> >>>>> Coventry
> >>>>> West Midlands
> >>>>> CV4 7AL
> >>>>> United Kingdom
> >>>
> >>> Is the 'extent' keyword what you're looking for?
> >>>
> >>
> >> No, because it needs detail. I was looking for a boolean switch that
> basically says: Respect the data, not beauty.
> >
> > I don't understand what you mean by 'beauty'. If your image is 100
> > pixels wide and 50 pixels tall, what is it about extent=[0,100,0,50]
> > that doesn't do what you want?
> >
> As I wrote, that's not what is happening. I get extent=[-10,110,0,50].
>
>
>
Which version of matplotlib are you using?  Also, are you on a 32-bit
machine or a 64-bit machine.  This might be related to a bug we have seen
recently.

Ben Root