On 12 Ago, 09:49, Jason Grout <jason-s...@creativetrax.com> wrote: > On 7/22/10 2:36 PM, Maurizio wrote: > > > > > > > I have a quick question that is related to engineering support (I was > > reading the document you posted on the wiki about sd24, and I see the > > roadmap is planning to address those issues for SAGE 7.0.. ouch!): I > > don't know exactly how this is achieved, but I can see that > > > sage: type(1) > > <type 'sage.rings.integer.Integer'> > > > this should come from the fact that the preparser replaces usual > > numbers with sage numerical types. > > Nonetheless, still we have: > > > sage: type([1,2,3]) > > <type 'list'> > > > This means that list are not replaced by anything internal, even if > > they are collector of python objects which are still sage numbers. I > > wonder which is the policy of SAGE towards arrays and matrices. I > > think there is a good base in numpy and scipy, so I wonder if it would > > make sense to let the preparser transform any list of numbers into a > > numpy array. That would greatly improve user ergonomy in case of raw > > numbers manipulation. > > That could be a not-default option, that could be activated using a > > function like: > > > def numpy_mode(str): > > if str == 'on': > > from numpy import * > > "turn any list into a numpy array" > > elif str == 'off': > > "reverse behaviour" > > > [I'm just talking on top of my head] > > This will probably require lots of changes in the sage codebase, since I > think there are lots of places that an input is tested to see if it is a > list. > > % find . -name \*.py\* | xargs grep isinstance |grep list|wc -l > 545 > > > > > Another slightly related issue is: could we make > > plot(numpy.array([1,2,3,4])) behave like > > list_plot(numpy_array([1,2,3,4]))? The way it is now, it just doesn't > > work... > > +1 to plot interpreting numpy arrays. However, shouldn't it interpret > the numpy arrays like it interprets lists? Right now, plot([1,2,3]) > works and plots the constant functions 1, 2, and 3. > > Thanks, > > Jason
What would you expect from such a plot([1,2,3])? Personally,a plot of a list of points. If the argument of plot is a list of constant values,can we imagine to change the behavior such to replicate that of list_plot? -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
