Hi, I'm trying to plot a barchart for use in a django site. It's creating a blank chart image though.(attached).
What am I doing wrong?
from pylab import *
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(figsize=(6,4))
canvas = FigureCanvas(fig)
ax = fig.add_subplot(111)
#from pylab import *
N = 7
menMeans = (20, 35, 30, 35, 27, 21, 60)
ind = arange(N) # the x locations for the groups
#print ind
width = 0.35 # the width of the bars
ax = bar(ind, menMeans, width, color='b')
#ylabel('Time')
title('Time In Minutes - Last 7 Days')
xticks(ind+width, ('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', '*') )
fig.set_facecolor('w')
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='PNG')
response = HttpResponse(imdata.getvalue(), mimetype='image/png')
return response
Thanks!
Erik
<<attachment: chart.png>>
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