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

[Damon M. <dam...@gm...>]

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?

-- 
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom