matplotlib-users Mailing List for matplotlib

On 05/27/2011 10:18 PM, .:BrAiN BuRnEr:. wrote:
> Hi,
>
> In my plot I would like to use two x-axis, in order to label the thicks
> in two different units.
> However, when I use the twiny command, the labels of the secondary
> x-axis overlap with the title of the figure.
>
> Is there a way to increase the space between the title and the plot?
> I already tried the top option in subplot_adjust, but this is also
> moving the title!
>
> Here is a small example (attached the png output):
> plt.figure()
> ax1=plt.subplot(111)
> plt.xlabel('axis 1')
> ax2=plt.twiny(ax1)
> plt.xlabel('axis 2')
> plt.title('title')

Save a reference to the text object returned by title, and then adjust 
the y-coordinate of its position:

t = plt.title('title')
t.set_y(1.09)
plt.subplots_adjust(top=0.86)

This y-coordinate is in normalized Axes units, so 1.0 is the top of the 
Axes frame--except that there is a small additional hard-wired pad, so 
setting y to 1.0 still leaves a little space.

Eric

> plt.show()
>
>
> Thanks
> __________
> BrainBurner
>
>
>
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I was looking for some ternary plots too.  I started with Chloe's code and
got it running (thanks!).  I'd like to be able to plot trajectories of
chemical composition over time from a simulation.  I saw that it would be
difficult to plot many points to make a curve using the existing code.  

Chloe noted that it might be good to use matplotlib's projection classes and
methods.  I took a stab at it, but I'm stuck and out of time for now.  I
made some progress (code and image attached).  However, it has problems that
would have to be fixed to create serious plots for publications and whatnot.  

Anyways, here it is... I hope someone with more experience with matplotlib
might know what to do.  I've noted the issues in the code.

Thanks,

Kevin

http://old.nabble.com/file/p31721702/ternary.png ternary.png 

http://old.nabble.com/file/p31721702/ternary.py ternary.py 

-- 
View this message in context: http://old.nabble.com/Ternary-Plotting-using-Matplotlib-tp29710153p31721702.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Thanks, Eric!

I had tried

pt = plot(...)

for p in pt:
  p.remove()

and that did not do the trick.  However, doing it the way you
suggested worked like a charm.  Thanks!


Patrick
---
Patrick Marsh
Ph.D. Student / Liaison to the HWT
School of Meteorology / University of Oklahoma
Cooperative Institute for Mesoscale Meteorological Studies
National Severe Storms Laboratory
http://www.patricktmarsh.com




On Fri, May 27, 2011 at 2:57 PM, Eric Firing <ef...@ha...> wrote:
> On 05/27/2011 07:53 AM, Patrick Marsh wrote:
>> Greetings,
>>
>> I'm needing to create two plots, one is to serve as an overlay on the
>> other.  The overlay contains a set of markers to identify points in
>> the underlaid probability field.  I'm doing this in a loop with a map
>> background, so to prevent redrawing the map every time, I want to
>> remove the markers after saving the plot (so I can then reuse the
>> background again).  I know how to remove contours, but cannot figure
>> out how to remove points.  Here is a link to a sample script that
>> illustrates the problem.
>>
>> https://gist.github.com/072c8612f313e8ea2355
>>
>> Ideally, I would expect each plot to have only a single point, but the
>> old points aren't being removed and are displayed on subsequent
>> images.  What am I doing wrong?
>
> Illustration with ipython -pylab:
>
> In [1]: xx = plot(1.3, 2.4, 'ro')
>
> In [2]: xx[0].remove()
>
> In [3]: draw()
>
> Note that plot() returns a list of Line2D objects, each of which has a
> remove() method.
>
> Eric
>
>
> ------------------------------------------------------------------------------
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