matplotlib-users Mailing List for matplotlib

On 09/30/2010 08:28 AM, Joey Richards wrote:
> When I use the errorbar() routine to plot data, unless I set hold=True as a kwarg (or set it globally), the data are plotted without the errorbars.  I believe it is because the routine first plots the error bars, then overplots the data points and for some reason the routine is clearing the axis in between these steps.

Fixed in 8724.

Eric

On 18/09/10 02:57, Joey Richards wrote:
> When I plot with the MacOSX backend using a serif font, the negative
> signs on the axis labels show up as the "missing glyph" open squares
> rather than minus signs.

Hello,

I have the same problem on MacOsX 10.4 and matplotlib 1.0, but also with
the default sans-serif font. I would guess that the default fonts
available with MacOSX do not have a glyph for the unicode character used
by matplotlib, but if you see it with different backends (i do not have
compiled them because i was to lazy to install the required libraries) I
suspect something is wrong with the macosx backend...

Cheers,
-- 
Daniele

On Fri, Oct 1, 2010 at 9:47 AM, Tony S Yu <ts...@gm...> wrote:

>
> On Oct 1, 2010, at 9:40 AM, Benjamin Root wrote:
>
> On Thu, Sep 30, 2010 at 8:44 PM, Tony S Yu <ts...@gm...> wrote:
>
>> I'd like to make something in between a box plot [1] and a histogram. Each
>> histogram would be represented by a single, tall, rectangular patch (like
>> the box in a box plot), and the patch would be subdivided by the bin edges
>> of the histogram. The face color of each sub-patch would replace the bar
>> height in the histogram.
>>
>> If any of that actually made sense:
>>
>> * Does this type of plot have a name?
>>
>> * Is there an easy way to do this in Matplotlib?
>>
>> * If there isn't an easy way, what would be a good starting point? Initial
>> ideas: 1) Use pcolor or imshow and embed this axes in a larger axes, 2)
>> represent the sub-patches as a PolyCollection.
>>
>> Thoughts?
>> -Tony
>>
>> [1] e.g.
>> http://matplotlib.sourceforge.net/examples/pylab_examples/boxplot_demo.html
>>
>
> Tony,
>
> I am not quite sure I understand.
>
>
> [snip]
>
> Or maybe something else in the gallery is more like what you want:
>
> http://matplotlib.sourceforge.net/gallery.html
>
> Ben Root
>
>
> I've checked the gallery, but I don't see anything that appears similar. In
> any case, I ended up hacking together something that works. I've attached an
> image of what I had in mind (created with the code at the very bottom of
> this reply).
>
> I ended up using mpl Rectangle objects and stringing them together using a
> PatchCollection. Maybe there's a more efficient way to do this, but this
> approach worked well-enough.
>
> Best,
> -Tony
>

Actually, that looks kinda cool.  If anyone is aware of the name for this
kind of plot, maybe we could add a new plotting function?

Ben Root

I just installed matplotlib-1.0.0 on my system (Snow Leopard, python 2.7),
but somehow when I try to import pyplot i get the error below.

For reference, I installed matplotlib from source. Prior to that I installed
libpng-1.4.4 and freetype-2.4.2 the usual way (./configure, make, make
install) plus I installed pkgcong as well. After getting the error I tried
the tips Friedrich R gave in this thread (
http://old.nabble.com/Symbol-not-found-td28994434.html) too, but I still get
the error.

>From a few google attempts it seems that it is an issue of dynamic vs static
linking. I can't say that I know what that is, but I'd be very interested in
knowing whether I can do anything from my side to sort things out.

Here is the error:

>>> import matplotlib.pyplot as plt

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    import matplotlib.pyplot as plt
  File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/pyplot.py",
line 23, in <module>
    from matplotlib.figure import Figure, figaspect
  File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/figure.py",
line 18, in <module>
    from axes import Axes, SubplotBase, subplot_class_factory
  File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axes.py",
line 14, in <module>
    import matplotlib.axis as maxis
  File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axis.py",
line 10, in <module>
    import matplotlib.font_manager as font_manager
  File
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/font_manager.py",
line 52, in <module>
    from matplotlib import ft2font
ImportError:
dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/ft2font.so,
2): Symbol not found: _FT_Attach_File
  Referenced from:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/ft2font.so
  Expected in: dynamic lookup