On 2009-09-14 16:08 PM, Gökhan Sever wrote: > > > On Mon, Sep 14, 2009 at 3:45 PM, <jason-s...@creativetrax.com > <mailto:jason-s...@creativetrax.com>> wrote: > > Robert Kern wrote: > > prctile does not handle the case where the exact percentile lies > between two > > items. scoreatpercentile does. > > > > > > If mlab is supposed to be compatible with matlab, then isn't this a > problem? > > From matlab, version 7.2.0.283 (R2006a) > > >> prctile([1 1 2 2 1 2 4 3 2 2 2 3 4 5 6 7 8 9 7 6 4 5 5],[0 25 50 75 > 100]) > > ans = > > 1.0000 2.0000 4.0000 5.7500 9.0000 > > > Of course, the 75th percentile is different here too (5.75 instead of > scipy's 5.5). I don't know how to explain that discrepancy. > > Jason > > > Now there are 3 different 75 percentiles :). Any ideas, which is one the > most correct?
They are all reasonable. There are lots of different ways of handling this case. From the R documentation: http://sekhon.berkeley.edu/stats/html/quantile.html -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
