Hi all, I'm trying to generate a pie chart to use in my django web app. But it keeps rendering in a rectanuglar canvas instead of a square one, so the pie is oblong instead of circular. It also keeps rendering with a grey background, I need the background to be white.
I've attached a jpg of the chart - here is my source.
def chart(request):
from PIL import Image as PILImage
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
from StringIO import StringIO
fig = Figure()
canvas = FigureCanvas(fig)
ax = fig.add_subplot(111)
#ax.plot([1,2,3])
labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
fracs = [15,30,45, 10]
ax.pie(fracs, labels=labels, shadow=True)
#ax.set_title('hi mom')
ax.grid(True)
#ax.set_xlabel('time')
#ax.set_ylabel('volts')
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
Also - can I choose my own colors for the slices?
Thanks!
Erik
<<attachment: chart.jpg>>
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