Creating Pie Chart from Python

[Thierry Lam]

Let's say I have the following data:

500 objects:
-100 are red
-300 are blue
-the rest are green

Is there some python package which can represen the above information
in a pie chart?

Thanks
Thierry

[jepler@unpythonic.net]

Re: Creating Pie Chart from Python

There are many.

One choice would be Tkinter's Canvas.

def frac(n): return 360. * n / 500

import Tkinter
c = Tkinter.Canvas( width=100, height=100); c.pack()
c.create_arc((2 ,2,98,98), fill="red", start=frac(0), extent = frac(100))
c.create_arc((2 ,2,98,98), fill="blue", start=frac(100) , extent = frac(400))
c.create_arc((2 ,2,98,98), fill="green", start=frac(400) , extent = frac(100))
c.mainloop()

Jeff

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[Ken Seehart]

Re: Creating Pie Chart from Python

Thierry Lam wrote:[color=blue]
> Let's say I have the following data:
>
> 500 objects:
> -100 are red
> -300 are blue
> -the rest are green
>
> Is there some python package which can represen the above information
> in a pie chart?
>
> Thanks
> Thierry
>[/color]

What is the user interface context?

Is it a web page? Do you want to create image files with pie chart? If
yes to either of these, try gdchart.

http://www.icewalkers.com/Linux/Software/52020/GDChart.html

http://athani.pair.com/msteed/software/gdchart/download.html

[Giovanni Dall'Olio]

Re: Creating Pie Chart from Python

PyChart?

[John Hunter]

Re: Creating Pie Chart from Python

>>>>> "Thierry" == Thierry Lam <lamthierry@gma il.com> writes:

Thierry> Let's say I have the following data: 500 objects: -100
Thierry> are red -300 are blue -the rest are green

Thierry> Is there some python package which can represen the above
Thierry> information in a pie chart?


It looks like in python there is more than one way to make a pie
chart. Here's another

from pylab import figure, pie, show
N, red, blue = 500, 100, 300
green = N - (red + blue)
figure(figsize= (6,6))
pie( (red, blue, green),
labels=('red', 'blue', 'green'),
colors=('red', 'blue', 'green'),)
show()

A screenshot of a slightly more elaborate example is at

http://matplotlib.sourceforge.net/screenshots.html#pie_demo

JDH

[Thierry Lam]

Re: Creating Pie Chart from Python

Those python pie chart add ons are not very useful. For my specific pie
chart, I have some 6-8 items to show up and some of them occupy only
2-5% of the pie. This cause the names and percentages to overlap each
other.