Hi, Hanno. I ran your sample session in numpy 0.9.8 (on a Mac, just so you know; I don't yet have numpy installed on my Windows platform, and I don't have immediate access to a *nix box) and could not reproduce the problem, i.e., it does appear to have been fixed in 0.9.8.
DG Hanno Klemm wrote: > Hello, > > numpy.var exhibits a rather dangereous behviour, as I have just > noticed. In some cases, numpy.var calculates the variance, and in some > cases the standard deviation (=square root of variance). Is this > intended? I have to admit that I use numpy 0.9.6 at the moment. Has > this been changed in more recent versions? > > Below a sample session > > > Python 2.4.3 (#1, May 8 2006, 18:35:42) > [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-52)] on linux2 > Type "help", "copyright", "credits" or "license" for more information. > >>>> import numpy >>>> a = [1,2,3,4,5] >>>> numpy.var(a) >>>> > 2.5 > >>>> numpy.std(a) >>>> > 1.5811388300841898 > >>>> numpy.sqrt(2.5) >>>> > 1.5811388300841898 > >>>> a1 = numpy.array([[1],[2],[3],[4],[5]]) >>>> a1 >>>> > array([[1], > [2], > [3], > [4], > [5]]) > >>>> numpy.var(a1) >>>> > array([ 1.58113883]) > >>>> numpy.std(a1) >>>> > array([ 1.58113883]) > >>>> a =numpy.array([1,2,3,4,5]) >>>> numpy.std(a) >>>> > 1.5811388300841898 > >>>> numpy.var(a) >>>> > 1.5811388300841898 > >>>> numpy.__version__ >>>> > '0.9.6' > > > > Hanno > > -- HMRD/ORR/NOS/NOAA <http://response.restoration.noaa.gov/emergencyresponse/> ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
