matplotlib-users Mailing List for matplotlib

Daniele,
I agree this is perhaps a little overly complicated. (However, once you
figure it out, it does give you a ton of flexibility.) I played around
with this a bit (thanks IPython!), and I may have figured out what you
wanted to do. I rewrote the example you linked from the MPL website. I
couldn't simplify it much, but it does change the size, location and labels
of the floating y axis.
#################
from mpl_toolkits.axes_grid1 import host_subplot
import mpl_toolkits.axisartist as AA
import matplotlib.pyplot as plt
host = host_subplot(111, axes_class=AA.Axes)
plt.subplots_adjust(right=0.75)
par1 = host.twinx()
par2 = host.twinx()
offset = 60
new_fixed_axis = par2.get_grid_helper().new_fixed_axis
par2.axis["right"] = new_fixed_axis(loc="right",
axes=par2,
offset=(offset, 0))
par2.axis["right"].toggle(all=True)
p1, = host.plot([0, 1, 2], [0, 1, 2], label="Density")
p2, = par1.plot([0, 1, 2], [0, 3, 2], label="Temperature")
p3, = par2.plot([0, 1, 2], [50, 30, 15], label="Velocity")
host.legend()
host.set_xlabel("Distance")
host.set_ylabel("Density")
host.axis["left"].label.set_color(p1.get_color())
host.set_xlim(0, 2)
host.set_ylim(0, 2)
par1.set_ylabel("Temperature")
par1.axis["right"].label.set_color(p2.get_color())
par1.set_ylim(0, 4)
par2.set_ylabel("Velocity")
par2.set_ylim(1, 65)
par2.yaxis.set_ticks( (20.0, 40.0) )
par2.yaxis.set_ticklabels( ('A', 'B') )
par2.axis["right"].label.set_color(p3.get_color())
par2.axis["right"].label.set_fontsize(18)
par2.axis["right"].major_ticklabels.set_fontsize(14)
plt.show()
##################
Hope that helps.
Ryan
On Tue, Oct 29, 2013 at 5:54 AM, Daniele Nicolodi <da...@gr...>wrote:
> On 29/10/2013 03:11, Ryan Nelson wrote:
> > Daniele,
> >
> > I noticed the same problem with the Qt backend. However, I was looking
> > at the documentation on the AxesGrid webpage here:
> > http://matplotlib.org/mpl_toolkits/axes_grid/users/overview.html
> > And I see the following warning:
> >
> > axes_grid and axisartist (but not axes_grid1) uses a custom Axes class
> > (derived from the mpl’s original Axes class). As a side effect, some
> > commands (mostly tick-related) do not work. Use axes_grid1 to avoid
> > this, or see how things are different in axes_grid and axisartist (LINK
> > needed)
> >
> > Unfortunately, no link. But perhaps there is a way to avoid using the
> > Axes class from axisartist in your use case. For example, could you
> > import the Axes class as follows:
> >
> > from matplotlib.axes import Axes
> >
> > That seems to work with the Qt and PDF backends on Windows 7 (Anaconda
> > Python).
>
> Hello Ryan,
>
> thanks for confirming the problem. I've also seen that note, but I
> thought "do not work" means that the methods raise an exception, not
> that they arbitrarily ignore arguments :(
>
> While the standard Axis class works for the cut-down example I posted,
> it does not for what I'm trying to achieve (having a second x axis below
> the main one). I came up with that solution following the matplotlib
> documentation:
>
>
> http://matplotlib.org/mpl_toolkits/axes_grid/users/overview.html#axisartist-with-parasiteaxes
>
> however I don't really understand why some of the contortions there are
> necessary (they are not explained in the documentation).
>
> Cheers,
> Daniele
>
>
>
> ------------------------------------------------------------------------------
> Android is increasing in popularity, but the open development platform that
> developers love is also attractive to malware creators. Download this white
> paper to learn more about secure code signing practices that can help keep
> Android apps secure.
> http://pubads.g.doubleclick.net/gampad/clk?id=65839951&iu=/4140/ostg.clktrk
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

Thank you very much !
On Tue, Oct 29, 2013 at 3:16 PM, Joe Kington <jof...@gm...> wrote:
> If you're asking how to do it interactively, just click on the zoom button
> again, and you should be able to fire pick events by clicking again.
>
> Hope that helps!
> -Joe
> On Oct 29, 2013 4:58 AM, "Nils Wagner" <ni...@go...> wrote:
>
>> Hi all,
>>
>> How can I use a pick event when I have used "Zoom to rectangle" before ?
>>
>> Nils
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Android is increasing in popularity, but the open development platform
>> that
>> developers love is also attractive to malware creators. Download this
>> white
>> paper to learn more about secure code signing practices that can help keep
>> Android apps secure.
>>
>> http://pubads.g.doubleclick.net/gampad/clk?id=65839951&iu=/4140/ostg.clktrk
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>>

If you're asking how to do it interactively, just click on the zoom button
again, and you should be able to fire pick events by clicking again.
Hope that helps!
-Joe
On Oct 29, 2013 4:58 AM, "Nils Wagner" <ni...@go...> wrote:
> Hi all,
>
> How can I use a pick event when I have used "Zoom to rectangle" before ?
>
> Nils
>
>
>
> ------------------------------------------------------------------------------
> Android is increasing in popularity, but the open development platform that
> developers love is also attractive to malware creators. Download this white
> paper to learn more about secure code signing practices that can help keep
> Android apps secure.
> http://pubads.g.doubleclick.net/gampad/clk?id=65839951&iu=/4140/ostg.clktrk
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>

Hi all,
How can I use a pick event when I have used "Zoom to rectangle" before ?
Nils

On 29/10/2013 03:11, Ryan Nelson wrote:
> Daniele,
> 
> I noticed the same problem with the Qt backend. However, I was looking
> at the documentation on the AxesGrid webpage here:
> http://matplotlib.org/mpl_toolkits/axes_grid/users/overview.html
> And I see the following warning:
> 
> axes_grid and axisartist (but not axes_grid1) uses a custom Axes class
> (derived from the mpl’s original Axes class). As a side effect, some
> commands (mostly tick-related) do not work. Use axes_grid1 to avoid
> this, or see how things are different in axes_grid and axisartist (LINK
> needed)
> 
> Unfortunately, no link. But perhaps there is a way to avoid using the
> Axes class from axisartist in your use case. For example, could you
> import the Axes class as follows:
> 
> from matplotlib.axes import Axes
> 
> That seems to work with the Qt and PDF backends on Windows 7 (Anaconda
> Python).
Hello Ryan,
thanks for confirming the problem. I've also seen that note, but I
thought "do not work" means that the methods raise an exception, not
that they arbitrarily ignore arguments :(
While the standard Axis class works for the cut-down example I posted,
it does not for what I'm trying to achieve (having a second x axis below
the main one). I came up with that solution following the matplotlib
documentation:
http://matplotlib.org/mpl_toolkits/axes_grid/users/overview.html#axisartist-with-parasiteaxes
however I don't really understand why some of the contortions there are
necessary (they are not explained in the documentation).
Cheers,
Daniele

Daniele,
I noticed the same problem with the Qt backend. However, I was looking at
the documentation on the AxesGrid webpage here:
http://matplotlib.org/mpl_toolkits/axes_grid/users/overview.html
And I see the following warning:
axes_grid and axisartist (but not axes_grid1) uses a custom Axes class
(derived from the mpl’s original Axes class). As a side effect, some
commands (mostly tick-related) do not work. Use axes_grid1 to avoid this,
or see how things are different in axes_grid and axisartist (LINK needed)
Unfortunately, no link. But perhaps there is a way to avoid using the Axes
class from axisartist in your use case. For example, could you import the
Axes class as follows:
from matplotlib.axes import Axes
That seems to work with the Qt and PDF backends on Windows 7 (Anaconda
Python).
Ryan
On Mon, Oct 28, 2013 at 7:37 PM, Daniele Nicolodi <da...@gr...>wrote:
> On 29/10/2013 00:17, Sterling Smith wrote:
> > While your example tries to be self contained, which is great!, there is
> no difference between these two conditions...
> >
> >> if BUG:
> >> ax1 = host_subplot(111, axes_class=Axes)
> >> else:
> >> ax1 = host_subplot(111, axes_class=Axes)
>
> Ops, obvious mistake. It should read:
>
> BUG = True
> if BUG:
> ax1 = host_subplot(111 , axes_class=Axes)
> else:
> ax1 = host_subplot(111)
>
>
> Cheers,
> Daniele
>
>
>
> ------------------------------------------------------------------------------
> Android is increasing in popularity, but the open development platform that
> developers love is also attractive to malware creators. Download this white
> paper to learn more about secure code signing practices that can help keep
> Android apps secure.
> http://pubads.g.doubleclick.net/gampad/clk?id=65839951&iu=/4140/ostg.clktrk
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>