Re: [Boa Constr] Fw: Any Chaco plugins?

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--- Flavio Codeco Coelho <fcc...@fi...> wrote:
> James,
> 
> doing what you want with matplotlib is as easy as:
> 
> 
> # a bar plot with errorbars
> from matplotlib.matlab import *
> 
> N = 5
> menMeans = (20, 35, 30, 35, 27)
> menStd =   (2, 3, 4, 1, 2)
> 
> ind = arange(N)  # the x locations for the groups
> width = 0.35       # the width of the bars
> p1 = bar(ind, menMeans, width, color='r',
> yerr=menStd)
> 
> womenMeans = (25, 32, 34, 20, 25)
> womenStd =   (3, 5, 2, 3, 3)
> p2 = bar(ind+width, womenMeans, width, color='y',
> yerr=womenStd)
> 
> ylabel('Scores')
> title('Scores by group and gender')
> set(gca(), 'xticks', ind+width)
> set(gca(), 'xticklabels', ('G1', 'G2', 'G3', 'G4',
> 'G5') )
> set(gca(), 'xlim', [-width,len(ind)])
> set(gca(), 'yticks', arange(0,41,10))
> 
> legend( (p1[0], p2[0]), ('Men', 'Women') )
> #axis([-10, 10, -10, 100])
> #savefig('barchart_demo')
> show()
> 
> 
> so I would suggest to you again to give it a try,
> you wont regret...
> 
> flavio

Yes I did have a look at this.

I was thinking of maybe using matplotlib as the
backend to my boa-based gui (which would also do such
things as work out Means, Standard deviations, 95%
confidence intervals etc. from the input data)..

I really like the look of matplotlib, but the one
advantage that PyChart seems to have over it (from my
very brief look at both) is that in matplotlib, bar
charts with error bars seem to have a default symbol
at the centre of the error bars, which looks ugly. It
would be nice if it was possible to change the style
of this symbol (or make it invisible) but the
documentation for matplotlib does not explicitly
mention anything about this.  Do you know if this is
possible? Perhaps it would be necessary for me to join
the matplotlib development but I am not very keen to
do this as my Python programming knowledge is very
sparse.. The default graphs in PyChart look a bit
nicer IMHO but they are written to the pwd as .ps file
or whatever, which you then need to launch a viewer to
look at, so a bit more cumbersome..  It has been used
for published scientific work though.

James