Re: [Numpy-discussion] Characteristic of a Matrix.
On 06/01/15 02:08, cjw wrote: This is not a comment on any present matrix support, but deals with the matrix class, which existed back when Todd Miller of the Space Telescope Group supported numpy. Matrix is a sub-class of ndarray. Since this Matrix class is (more or less) deprecated and its use discouraged, I think it should just be left as it is. Sturla ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] Characteristic of a Matrix.
On 06-Jan-15 7:31 AM, Sturla Molden wrote: On 06/01/15 02:08, cjw wrote: This is not a comment on any present matrix support, but deals with the matrix class, which existed back when Todd Miller of the Space Telescope Group supported numpy. Matrix is a sub-class of ndarray. Since this Matrix class is (more or less) deprecated and its use discouraged, I think it should just be left as it is. Sturla Sturla, My recollection, from discussions, at the time of the introduction of the @ operator, was that there was no intention to disturb the existing Matrix class. I see the matrix as a long recognized mathematical entity. On the other hand, the array is a very useful computational construct, used in a number of computer languages. Since matrices are now part of some high school curricula, I urge that they be treated appropriately in Numpy. Further, I suggest that consideration be given to establishing V and VT sub-classes, to cover vectors and transposed vectors. Regards, Colin W. ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] Characteristic of a Matrix.
Hi Colin, On Wed, Jan 7, 2015 at 12:58 AM, cjw c...@ncf.ca wrote: My recollection, from discussions, at the time of the introduction of the @ operator, was that there was no intention to disturb the existing Matrix class. Yeah, we're not going to be making any major changes to the numpy.matrix class -- e.g. we certainly aren't going to disallow non-numeric data types at this point. I see the matrix as a long recognized mathematical entity. On the other hand, the array is a very useful computational construct, used in a number of computer languages. Since matrices are now part of some high school curricula, I urge that they be treated appropriately in Numpy. Further, I suggest that consideration be given to establishing V and VT sub-classes, to cover vectors and transposed vectors. The numpy devs don't really have the interest or the skills to create a great library for pedagogical use in high schools. If you're interested in an interface like this, then I'd suggest creating a new package focused specifically on that (which might use numpy internally). There's really no advantage in glomming this into numpy proper. -n -- Nathaniel J. Smith Postdoctoral researcher - Informatics - University of Edinburgh http://vorpus.org ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] Characteristic of a Matrix.
On Tue, Jan 6, 2015 at 8:20 PM, Nathaniel Smith n...@pobox.com wrote: Since matrices are now part of some high school curricula, I urge that they be treated appropriately in Numpy. Further, I suggest that consideration be given to establishing V and VT sub-classes, to cover vectors and transposed vectors. The numpy devs don't really have the interest or the skills to create a great library for pedagogical use in high schools. If you're interested in an interface like this, then I'd suggest creating a new package focused specifically on that (which might use numpy internally). There's really no advantage in glomming this into numpy proper. Sorry for taking this further off-topic, but I recently discovered an excellent SAGE package, http://www.sagemath.org/. While it's targeted audience includes math graduate students and research mathematicians, parts of it are accessible to schoolchildren. SAGE is written in Python and integrates a number of packages including numpy. I would highly recommend to anyone interested in using Python for education to take a look at SAGE. ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
