Fred - I'm forwarding your mail on to numpy-discussion@lists.sourceforge.net, which I believe is the proper venue to deal with your comments. If the current Numerical Python manual directed you to support@icf.llnl.gov for support-related questions, that also needs to be updated. Thank you - Lee Busby ======================================================================= From: Fred Yankowski <fred@ontosys.com> To: support@icf.llnl.gov Subject: comments on the Numerical Python manual Greetings, I'm learning NumPy by working through the "Numerical Python" manual (Oct 9, 2000 version). So far the manual has been a great introduction to the software and I really appreciate the work of the authors in providing it. I have found a couple of problems in the text, as follows: On page 4 in section 4, it seems that >>> vector1 = array((1,2,4,5)) should be the following instead: >>> vector1 = array((1,2,3,4,5)) On page 48 in section 8, the translation table used in the "brightening" function acts instead to darken the image. I found that scaling proportional to a square-root function worked well: table = (arange(256)**.5 * (255**.5)).astype('b') One side note: I'm surprised that the coordinate system used by the NumTut.view function has X axis values increasing to the left. Is that standard for some graphing systems? I've never worked with such a system before. Or am I misunderstanding what I'm seeing with view? I'm basing this on inspection of view(arange(100)**2)) and view(arange(100)**.5). -- Fred Yankowski fred@OntoSys.com tel: +1.630.879.1312 Principal Consultant www.OntoSys.com fax: +1.630.879.1370 OntoSys, Inc 38W242 Deerpath Rd, Batavia, IL 60510, USA