Hi,
I like to add Graphs with matplotlib directly into my sites. I used a
web2py slice to get an image into a variable:
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
import cStringIO
def plot(title='title',xlab='x',ylab='y',mode='plot',
data={'xxx':[(0,0),(1,1),(1,2),(3,3)],
'yyy':[(0,0,.2,.2),(2,1,0.2,0.2),(2,2,0.2,0.2),(3,3,0.2,0.3
)]}):
fig=Figure()
fig.set_facecolor('white')
ax=fig.add_subplot(111)
if title: ax.set_title(title)
if xlab: ax.set_xlabel(xlab)
if ylab: ax.set_ylabel(ylab)
legend=[]
keys=sorted(data)
for key in keys:
stream = data[key]
(x,y)=([],[])
for point in stream:
x.append(point[0])
y.append(point[1])
if mode=='plot':
ell=ax.plot(x, y)
legend.append((ell,key))
if mode=='hist':
ell=ax.hist(y,20)
#if legend:
# ax.legend([x for (x,y) in legend], [y for (x,y) in legend],
# 'upper right', shadow=True)
canvas=FigureCanvas(fig)
stream=cStringIO.StringIO()
canvas.print_png(stream)
return stream.getvalue()
def pcolor2d(title='title',xlab='x',ylab='y',
z=[[1,2,3,4],[2,3,4,5],[3,4,5,6],[4,5,6,7]]):
fig=Figure()
fig.set_facecolor('white')
ax=fig.add_subplot(111)
if title: ax.set_title(title)
if xlab: ax.set_xlabel(xlab)
if ylab: ax.set_ylabel(ylab)
image=ax.imshow(z)
image.set_interpolation('bilinear')
canvas=FigureCanvas(fig)
stream=cStringIO.StringIO()
canvas.print_png(stream)
return stream.getvalue()
this is my controler:
def Testimg():
plotimg=plot()
return dict(plotimg=plotimg)
and this is my view:
{{extend 'layout.html'}}
Some Content
<table>
{{=TR(TD(Test),TD('Value'))}}
</table>
{{=plotimg}}
I managed to view the plot but I cant get it embedded into my page with
some content above and below.
And I get (probably) the binary png displayed as text
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