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

[K.-Michael A. <kmi...@gm...>]

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].


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