matplotlib-users Mailing List for matplotlib

Allen Beye Riddell <all...@gm...> writes:

> I'd like to remove the whitespace, padding, offset, etc on the left and
> right of the plot as I'm writing the entire thing to a jpg. I've turned
> the frame, axes, ticks off, but the space still remains.
 [...]
>     ax = fig.add_subplot(111)

Replace this line by

      ax = fig.add_axes((0,0,1,1))

The default subplot axes leave some space for tick labels etc., but
this gives you axes spanning the full figure.

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Hi,

I've searched the archives but can't find a solution to this problem.
I'd like to remove the whitespace, padding, offset, etc on the left and
right of the plot as I'm writing the entire thing to a jpg. I've turned
the frame, axes, ticks off, but the space still remains.

I've attached the code and the resulting image.

code (inside a django app):

def hours_chart(request):
    from PIL import Image as PILImage
    from matplotlib.backends.backend_agg import FigureCanvasAgg as
FigureCanvas
    from matplotlib.figure import Figure
    from matplotlib.axes import Axes
    from StringIO import StringIO
    fig = Figure(figsize=(3,1),facecolor='r') # w,h in inches
    fig.frameon = False
    canvas = FigureCanvas(fig)
    ax = fig.add_subplot(111)
    values = [d.get_total_hours() for d in
Debrief.objects.all().order_by('date')] # the data
    ax.plot(values,lw=2)
    ax.axis('off')
    canvas.draw()
    size = canvas.get_renderer().get_canvas_width_height()
    buf=canvas.tostring_rgb()
    im=PILImage.fromstring('RGB', size, buf, 'raw', 'RGB', 0, 1)
    imdata=StringIO()
    im.save(imdata, format='JPEG')
    response = HttpResponse(imdata.getvalue(), mimetype='image/jpeg')
    return response

This is the result -- as you can see there's a lot of white space on the
left of the plot:

On 6/3/07, Werner Hoch <wer...@gm...> wrote:
> Hi all,
>
> I've build matplotlib but there is no matplotlib/backends/_wxagg.so.
>
> Even without that file matplotlib works fine with the WX backend and
> pycrust.
>
> What is that file good for?
> Is it required to run matplotlib properly (maybe in other use cases)?
>
> I'm working on openSUSE 10.2 on x86_64.

_wxagg.so is a piece of extension code we used to efficiently transfer
portions of the agg canvas to the wx canvas.  Starting with wxpython
2.8, it became possible to do this with pure python using python
buffer objects, so we turned it off by default.  If you are using
wxpython 2.6, and need this functionality, eg for some of the
matplotlib widgets or animation techniques described at

http://www.scipy.org/Cookbook/Matplotlib/Animations

simply set BUILD_WXAGG=1 in setup..py and rebuild mpl.

JDH

Hi all,

I've build matplotlib but there is no matplotlib/backends/_wxagg.so.

Even without that file matplotlib works fine with the WX backend and 
pycrust.

What is that file good for?
Is it required to run matplotlib properly (maybe in other use cases)?

I'm working on openSUSE 10.2 on x86_64.

Regards
Werner