Re: [PyX-user] trouble with compare.py example and data.list

[Tara G. <tg...@cs...>]

Hi Axel,

I did try adding in a comma option to the regexp earlier (although without the 
whitespace, as I never have any) and couldn't get it working, probably just some 
syntax error I couldn't find. :p

Anyway, that works a treat now, thanks very much!

Tara

Axel Freyn wrote:
> Hi Tara,
> On Wed, Mar 17, 2010 at 05:05:10PM +0000, Tara Gilliam wrote:
>> Hi,
>>
>> I've been trying to plot a nested bar chart from some data in a csv file.
>> I couldn't find a simple way to swap the column separator from whitespace 
>> to comma (I tried tweaking the regexp for the columnpattern, but couldn't 
>> get it to work), so I've ended up using graph.data.list instead.
> Well, there I know a solution:
> If you use "(.*?)(,\s*|\s+|$)" as columnpattern, he will understand:
> 1,2
> 1, 2
> 1,  2
> 1 2
> 1  2
> so:
>  - a commma, followed by an arbitrary (0 or more) number of spaces
>  - no comma, but one or more spaces
> 
> you can change this separator within one file. The generalized
> "minimal.py" reads:
> 
> import re
> from pyx import *
> g = graph.graphxy(width=8)
> g.plot(graph.data.file("minimal.dat",
> g.plot(graph.data.file("minimal.dat", columnpattern=re.compile(r"(.*?)(,\s*|\s+|$)"), x=1, y=2))
> g.writeEPSfile("minimal")
> g.writePDFfile("minimal")
> 
> HTH,
> 
> Axel
> 
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