Re: [Matplotlib-users] Toggling country boundaries in MPL Basemap

[Jeff W. <js...@fa...>]

Mauro Cavalcanti wrote:
> Dear Jeff,
>
> Sorry, I then got a TypeError: remove() takes exactly one argument (0
> given)... :-(
>
> Best regards,
>   

Mauro:  Don't know why that would be.  Here's what I get

% ipython --pylab

In [3]  from mpl_toolkits.basemap import Basemap

In [4]: m = Basemap()

In [5]: c = m.drawcountries()  # map pops up with country boundaries drawn

In [6]: type(c)
Out[6]: <class 'matplotlib.collections.LineCollection'>

In [7]: help(c.remove)
Help on method remove in module matplotlib.artist:

remove(self) method of matplotlib.collections.LineCollection instance
    Remove the artist from the figure if possible.  The effect
    will not be visible until the figure is redrawn, e.g., with
    :meth:`matplotlib.axes.Axes.draw_idle`.  Call
    :meth:`matplotlib.axes.Axes.relim` to update the axes limits
    if desired.

In [8]: c.remove()

In [9]: draw()  # countries disappear from  map.

-Jeff
> 2008/12/5 Jeff Whitaker <js...@fa...>:
>   
>> Mauro Cavalcanti wrote:
>>     
>>> Dear Jeff,
>>>
>>> Thanks for your fast reply. Unfortunately, I have not been able to get
>>> yet working:
>>>
>>> I have a menu event like this:
>>>
>>> borders = []
>>> if self.MapDrawBorderItem.IsChecked():
>>>        borders = self.map.drawcountries()
>>> else:
>>>        self.ax.lines.remove(borders)
>>>       # .... redraw the map here...
>>>
>>> But I got a ValueError: list.remove(x): x not in list
>>>
>>> Any hints?
>>>
>>>       
>> Mauro:  Instead of
>>
>> self.ax.lines.remove(borders)
>>
>> I think should simply do
>>
>> borders.remove()
>>
>> -Jeff
>>     
>>> With best regards,
>>>
>>> 2008/12/5 Jeff Whitaker <js...@fa...>:
>>>
>>>       
>>>> Mauro Cavalcanti wrote:
>>>>
>>>>         
>>>>> Dear ALL,
>>>>>
>>>>> Always engaged in pushing MPL/Basemap ahead of its limits, here am I
>>>>> again with a humble question: I want to be able to toggle the display
>>>>> of country boundaries on a map using a menu option on my wxPython
>>>>> interface. It is quite easy to initially plotting a map without
>>>>> borders and then toggling them on, but I could not figure out a way to
>>>>> toggling them off (if possible, without redrawing the whole map). Is
>>>>> there any trick to do this? ;-)
>>>>>
>>>>> Thanks in advance!
>>>>>
>>>>> With warmest regards,
>>>>>
>>>>>
>>>>>
>>>>>           
>>>> Mauro:
>>>>
>>>> The drawcountries() method returns a matplotlib line collection.
>>>>  Invoking
>>>> the remove() method of the line collection will remove the countries from
>>>> the axes instance.
>>>>
>>>> -Jeff
>>>>
>>>> --
>>>> Jeffrey S. Whitaker         Phone  : (303)497-6313
>>>> Meteorologist               FAX    : (303)497-6449
>>>> NOAA/OAR/PSD  R/PSD1        Email  : Jef...@no...
>>>> 325 Broadway                Office : Skaggs Research Cntr 1D-113
>>>> Boulder, CO, USA 80303-3328 Web    : http://tinyurl.com/5telg
>>>>
>>>>
>>>>
>>>>         
>>>
>>>
>>>       
>> --
>> Jeffrey S. Whitaker         Phone  : (303)497-6313
>> Meteorologist               FAX    : (303)497-6449
>> NOAA/OAR/PSD  R/PSD1        Email  : Jef...@no...
>> 325 Broadway                Office : Skaggs Research Cntr 1D-113
>> Boulder, CO, USA 80303-3328 Web    : http://tinyurl.com/5telg
>>
>>
>>     
>
>
>
>   


-- 
Jeffrey S. Whitaker         Phone  : (303)497-6313
Meteorologist               FAX    : (303)497-6449
NOAA/OAR/PSD  R/PSD1        Email  : Jef...@no...
325 Broadway                Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web    : http://tinyurl.com/5telg