Daniel Poitras wrote: > Hello, > > I tried different arcsin functions on a complex number (z=0.52+0j) and > obtained > the following results: > > cmath.asin(z) gives (0.54685095069594414+0j) #okay > > -1j*log(1j*z+sqrt(1-z**2)) gives (0.54685095069594414+0j) #okay, by definition > > numarray.arcsin(z) gives (0.54685095069594414+0j) #still okay > > but > > numpy.arcsin(z) gives (0.54685095069594414+0.54685095069594414j) #bug?? > > > Is it really a bug in numpy, or is there another explanation? >
It's a bug. I seem to remember fixing this one before, but I guess it crept back in (or the bug I fixed was a similar one in another piece of code. Should be fixed in SVN now. -Travis ------------------------------------------------------------------------- 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
