Mailman 3 April 2005 - SciPy-Dev

New Enthon Test Release
by Joe Cooper April 12, 2005

April 12, 2005

Hi all, I posted a new test release of Enthon yesterday, and I think this one is approaching useful. I'm running out of things I can test, in my limited knowledge of all of the components that it contains. So, I'd like to ask anyone who has a vested interest in an easy to install bundle of Python stuff for Windows to download this release and give it a try. A fresh install is probably the best way to test it, as I haven't figured out how to make Wise remove the extraneous menu items on upgrade (the uninstaller seems to leave a few sticking around too...will probably get that fixed before the final release). Grab it here: http://download.enthought.com/enthought_python-2.3.5-1069.exe Submit bug reports to the roundup instance, or send me an email, if you find problems. Thanks!

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matrixmultiply()
by David Grant April 8, 2005

April 8, 2005

Can anyone tell me why the * operation on matrices is for element-wise multiplcation and not matrix multiplication for Numeric/numpy arrays? Or at least tell me a nice way to do A*B*C*D*E*F, where the * denotes matrix multiplication. I once wrote a function where I passed those to a function as arrary of arrays, so mult([A,B,C,D,E,F]) and the function multiplied them all together. But I can't remember where I put this function, and I was wondering if there was an easier way. -- David J. Grant http://www.davidandnasha.ca

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kron function in scipy.linalg.basic
by David Grant April 7, 2005

April 7, 2005

Re-posting to scipy-dev as it might be a bug. I'm using the kron() function in scipy.linalg.basic but I get an error I do this: >>>>>> from scipy.linalg.basic import kron >>>>>> from Numeric import * >>>>>> a=ones((2,2)) >>>>>> b=ones((2,2)) >>>>>> kron(a,b) >>> >>> Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/lib/python2.3/site-packages/scipy/linalg/basic.py", line 506, in kron o = outerproduct(a,b) NameError: global name 'outerproduct' is not defined I cannot understand why outerproduct would not be imported in basic.py.... Doing a "from Numeric import outerproduct, concatenate" seems to fix the problem, but I haven't tested with any real numbers or anything. concatenate is missing as well. Dave -- David J. Grant http://www.davidandnasha.ca

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