On Wed, Jul 15, 2009 at 10:47 PM, william ratcliff<william.ratcl...@gmail.com> wrote: > Hi! My student, William Flynn, has been working a lot this summer using > sympy--thanks for all of the efforts on this project. We're doing some
Thanks for using it and trying to fix the noncommutative problems and other things. > work in a windows environment and find that pretty printing (to generate > pngs) still has a problem. Our hack at the moment is to use the python > subprocessing module to call latex and later run yap. We need to clean > things up so that we check for existence of latex on the user's machine, > etc--but is this the approach that the community would like to take? We > also considered tried to go the matplotlib route to generate pngs, but ran > into a problem with long equations (which ironically, was a problem in latex > as well). We managed to get a Google Summer of Code project fixing exactly this problem. Freddie setup a new project for this: http://code.google.com/p/mathtex/ http://gsoc-mathtex.blogspot.com/ it basically uses matplotlib rendering engine. If you run into problems with long equations, could you please report it in the mailinglist here: http://groups.google.com/group/mathtex-dev Freddie will look into that. > Also, we have some rather long expressions involving exponentials, dirac > delta functions, etc. and latex has difficulty breaking them up > automatically. In the mathematical literature, it would seem that people > generally do this themselves using several > align statements. One possibility that we are considering is breaking up > the expression by numbers of terms, but in sympy, > is there an easy way to determine if for example a '+' sign is inside of a > function, or outside of a function? Also, while this may work for us, might Aaron replied to this one already (e.g. use .args) > some kind of "printing_strategies" class be useful, which a user could > subclass? Yes, I would implement this either as a profile variable in a latex printer, or a new printer. Probably the profile variable, like latex(<some long expression>, wrap=80) (wrap after 80 --- well, should it wrap after 80 characters?) I guess rather to fit into the page, so e.g. maybe it could call mathtex to obtain the width of the Add terms and cut it just right. see: In [2]: latex?? for the source code of how it works. Ondrej --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
