NumPy-Discussion April 2007

numpy-discussion@python.org

134 participants
124 discussions

Release of NumPy 1.0.2 for Monday
by Travis Oliphant 02 Apr '07

02 Apr '07

I'm going to be tagging the tree for the NumPy 1.0.2 release tomorrow evening in preparation for the release on Monday. I've closed several bugs. Are there any show-stoppers remaining to be fixed? -Travis

2 2

Assembling an array from parts
by Bill Baxter 02 Apr '07

02 Apr '07

What's the best way of assembling a big matrix from parts? I'm using lagrange multipliers to enforce constraints and this kind of matrix comes up a lot: [[ K, G], [ G.T , 0]] In matlab you can use the syntax [K G; G' zeros(nc)] In numpy I'm using vstack([ hstack([ K,G ]), hstack([ G.T, zeros((nc,nc)) ]) ]) Which has a lot of excess verbiage and parentheses that make it hard to type and hard to parse what's going on. It would be a little nicer if there were some kind of function like 'arraystack': arraystack( [ [K, G], [G.T, zeros((nc,nc)) ]] ) Is there anything like this already? I haven't found anything in the example list like that. But maybe concatenate() is flexible enough --bb

2 1

Violation of array scalar multiplication rules?
by Charles R Harris 01 Apr '07

01 Apr '07

Just asking. In [35]: type(array(1.0)*2) Out[35]: <type 'numpy.float64'> In [36]: type(array(1.0)) Out[36]: <type 'numpy.ndarray'> Chuck

2 1

organizational question
by Alan G Isaac 01 Apr '07

01 Apr '07

Is either NumPy or SciPy substantially supported by an identifiable and actual non-profit organization? I ask because I think both fit under http://www.mellon.org/grant_programs/programs/copy_of_research item 4. Here is the announcement: http://matc.mellon.org/ Note that universities are among the nominees: http://matc.mellon.org/2007_nominations Cheers, Alan Isaac

2 1

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NumPy-Discussion April 2007