+1 for including this function... I had made the same one, but mine is actually 5 times slower than the one proposed in trac 6245 :P
Is it possible to not name it "hadamard_product"? Coming from MatLab, I've used it hundreds of time, but I would have never recognized that "hadamard_product" could be the name associated to it. If possible, in case of a new function, I would call it "mul_something" so that anybody looking for some sort of multiplication could enter: "mul[Tab]" and get something like: "mul_elementwise", and immediately recognize the meaning :) In my opinion, guessing the first letters of the operation (multiplication) is much easier than guessing those of the adjective (elementwise? hadamard?...). OffTopic: Just for the records, for the same reason I would like to find an alias of the "find_root" function, with the name "solve_numerical" or something like that, so that when I do "sol[Tab]" I get all the functions related to solving an equation, whatever the domain. Regards Maurizio On 15 Giu, 17:08, Jason Grout <jason-s...@creativetrax.com> wrote: > paramaniac wrote: > > Dear Sage Developers, > > > It would be very nice if Sage supported the element-wise > > multiplication of matrices like the .* operator in Octave/Matlab. > > I was about to point out the recent thread about this, but then realized > it was you that started that thread and acknowledged the response. Are > you saying that you would like to see the code mentioned in that thread > (http://groups.google.com/group/sage-support/browse_thread/thread/011a...) > incorporated into Sage as a function, maybe as P.hadamard_product() or > something? > > Jason > > > EXAMPLE: > > > sigma, tau, beta = var('sigma tau beta') > > A = matrix([[-1/tau, sigma/tau],[sigma/tau, -1/tau]]) > > B = matrix([[beta/tau, 0],[0, beta/tau]]) > > C = matrix([[1,0],[0,1]]) > > D = matrix([[0,0],[0,0]]) > > I = identity_matrix(2) > > s, t = var('s t') > > P = C*(s*I-A)^(-1)*B+D > > P = P.simplify_rational() > > > RGA = P .* P.inverse().transpose() > > > Regards, > > Lukas > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
