"William Stein" <[EMAIL PROTECTED]> writes: > On 7/26/07, David Joyner <[EMAIL PROTECTED]> wrote: >> On 7/26/07, mak <[EMAIL PROTECTED]> wrote: >> > 1. How do I change the entire row or column of a matrix at once? In >> > pari, I could do e.g. a=[1,2,3;4,5,6], and then put a[1,]=[0,0,0], >> > which would give a=[0,0,0;4,5,6]. What's the sage equivalent? > > There is no SAGE equivalent yet.
I really miss the numpy syntax, including broadcasting. For example, a[1] is the second row a[1:3] is the subarray consisting of the second and third rows a[:, 1] is the second column a[:, 1:3] is the subarray consisting of the second and third columns a[:, 1:3] += 2 adds 2 to each element in that subarray But there's a lot more you do, concisely and with the loops done in C. (Implicitly, I also like that numpy allows multiple views into the same data.) Dan --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
