Re: [Matplotlib-users] Bar graph performance

[Eric F. <ef...@ha...>]

On 05/02/2010 05:48 PM, Kun Hong wrote:
> Hi,
>
> I am new to matplotlib. So if I ask sth stupid, please bear with me.
>
> I am using matplotlib to present  large data set in different graph
> types,
> bar, dot, line, etc. I find that the bar graph has very bad performance.
> Say, I draw data points of about ten thousand. Using dot graph, it draws
> in a second. But using bar graph, it draws in tens of seconds.
>
> I was wondering what causes this difference. Is there a way to improve
> the
> bar graph performace? (Maybe I am not drawing it right, then, please
> give
> me a pointer)
>

Also check out step().
http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.step

Eric

> Below is a simple example:
>
> from np.random import uniform
> from numpy.random import uniform
> x = uniform(0, 10, 14000)
> y = uniform(0, 100, 14000)
> plt.plot(x, y, 'bo')
> plt.bar(x, y)
>
>
> Thanks,
> Kun
>
>
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