Ping! Is anyone else seeing this? It should be easy to test. If so, I think it's a bug.
Best, Mike On Jun 21, 2006, at 9:39 PM, Michael Fitzgerald wrote: > > Hello all, > > I'm encountering some (relatively new?) behavior with masked arrays > that > strikes me as bizarre. Raising zero to a floating-point value is > triggering > a mask to be set, even though the result should be well-defined. > When using > fixed-point integers for powers, everything works as expected. I'm > seeing > this with both numarray and numpy. Take the case of 0**1, > illustrated below: > >>>> import numarray as n1 >>>> import numarray.ma as n1ma >>>> n1.array(0.)**1 > array(0.0) >>>> n1.array(0.)**1. > array(0.0) >>>> n1ma.array(0.)**1 > array(0.0) >>>> n1ma.array(0.)**1. > array(data = > [1.0000000200408773e+20], > mask = > 1, > fill_value=[ 1.00000002e+20]) > >>>> import numpy as n2 >>>> import numpy.core.ma as n2ma >>>> n2.array(0.)**1 > array(0.0) >>>> n2.array(0.)**1. > array(0.0) >>>> n2ma.array(0.)**1 > array(0.0) >>>> n2ma.array(0.)**1. > array(data = > 1e+20, > mask = > True, > fill_value=1e+20) > > I've been using python v2.3.5 & v.2.4.3, numarray v1.5.1, and numpy > v0.9.8, > and tested this on an x86 Debian box and a PPC OSX box. It may be > the case > that this issue has manifested in the past several months, as it's > causing a > new problem with some of my older code. Any thoughts? > > Thanks in advance, > Mike > > > All the advantages of Linux Managed Hosting--Without the Cost and > Risk! > Fully trained technicians. The highest number of Red Hat > certifications in > the hosting industry. Fanatical Support. Click to learn more > http://sel.as-us.falkag.net/sel? > cmd=lnk&kid=107521&bid=248729&dat=121642 > _______________________________________________ > Numpy-discussion mailing list > Numpy-discussion@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/numpy-discussion Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
