You can use the scipy version:
|~|[10]>from scipy.stats import stats
|~|[11]>stats.scoreatpercentile(x,50)
Out [11]:7.5

Le vendredi 28 mars 2008, David Simpson a écrit :
> I would like to find percentiles, with interpolation where needed, but
> the matplotlib prctile seems to be different to matlab in this respect:
>
> In [1]: x = array([ 3.0, 5.0, 7.0, 8.0, 9.0, 11.0 ])
>
> In [2]: median(x)
> Out[2]: 7.5
>
> In [3]: prctile(x,50)
> Out[3]: 8.0
>
>
> is there a function available which does include interpolation, or
> should I just write my own? (I'd also like 10th and 90th percentiles for
> example).
>
> Thanks, Dave
>
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