Darren Dale wrote: > On Mon, Mar 23, 2009 at 4:03 PM, Robert Bradshaw < > rober...@math.washington.edu> wrote: > >> On Mar 22, 2009, at 6:49 AM, Darren Dale wrote: >> >> On Mar 20, 10:31 pm, Jason Grout <jason-s...@creativetrax.com> wrote: >>>> Maurizio wrote: >>>> >>>>> Not yet... I think I was previously asking whether some of you guys >>>>> are interested in trying to contact them, if you do think it does >>>>> makes sense. >>>>> >>>> I mean, if this community is interested in having this feature, the >>>>> Quantities developers are going to find some good feedback, otherwise, >>>>> we could just probably end up losing a good occasion, because things >>>>> are not ready yet (although I hope that's not the case)! >>>>> >>>> I think there are a good number of people now that would like to have >>>> the feature, and as you well know, there are lots and *lots* of future >>>> users that would like to have the functionality. >>>> >>>> I'd say it's time to contact them and see if they can help. If there >>>> needs to be changes made to Quantities, then making them now, while it >>>> is still solidifying, would be advantageous. >>>> >>> Hello, I am Darren Dale, the developer of Quantities. Thank you >>> Maurizio for contacting me. >>> >> Glad to hear from you. >> >> [...] >> >> I guess the question I have for this list is, what would be required >>> for quantities to work in sage? I would prefer to try to work out the >>> numpy issues I alluded to before quantities gets too much exposure, in >>> case changes in API are required (unlikely). >>> >> >> Am I correct in understanding that the values in Quantities all need to be >> NumPy values? If this is the case, it probably boils down to NumPy's not >> handling of non-Python types. This really needs to get resolved. >> > > Quantities values are all instances of Quantity or a subclass thereof, and > Quantity itself is a subclass of ndarray. It sounds like the first step > would be to work out this compatibility issue between sage objects and > ndarray. Has anyone brought it up at numpy-discussion?
Not that I'm aware of. As far as I can tell, the root of the problem boils down to what was explained in http://groups.google.com/group/sage-devel/msg/f0e3d8d7c5a05afa Do you know what is going on (why a "NotImplemented" is returned)? Or more importantly, do you know if that is something that we need to implement, or something that numpy needs to implement? If you don't know the answer off the top of your head, I agree that posting to the numpy list is the best thing. Thanks, Jason --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
