On Sat, Oct 25, 2008 at 3:39 PM, Alan Bromborsky <[EMAIL PROTECTED]> wrote: > > Ondrej Certik wrote: >> On Fri, Oct 24, 2008 at 1:35 PM, Alan Bromborsky <[EMAIL PROTECTED]> wrote: >> >>> Ondrej Certik wrote: >>> >>>> On Wed, Oct 22, 2008 at 7:11 AM, Alan Bromborsky <[EMAIL PROTECTED]> wrote: >>>> >>>> >>>>> Using sympy I have attached a program (LaTeX.py) demonstrating Maxwell's >>>>> equations using geometric calculus. Also attached is a version of >>>>> GAsympy.py with some geometric calculus extensions (the version in sympy >>>>> only does geometric algebra). The demo program is called LaTeX.py since >>>>> it uses LaTeX to show the equations in a nice format. Eventually I will >>>>> use the standard latex printing system in sympy with some >>>>> modifications. Just run LaTeX.py and see what come out! >>>>> >>>>> >>>> Wow, this is impressive! Thanks for doing this. >>>> >>>> I would like the LaTeX class to be integrated with our LatexPrinter, >>>> see sympy/printing/latex.py. Do you have any comments on that? Because >>>> you are duplicating a lot of stuff in your own class. >>>> >>>> Ondrej >>>> >>>> >>>> >>> I need to consult with you more on how your printer classes in general >>> work before starting integrating my latex with your latex. Also with >>> regard to the actual math part of geometric calculus, now that I can do >>> geometric derivatives in rectangular coordinates I need to implement >>> curvilinear coordinates for practical applications which means I need to >>> do some pencil and paper derivations. >>> >> >> Ok. >> >> Related note I wrote recently regarding my research: >> >> I had to convert the Laplace equation with nonconstant conductivity >> into cylindrical coordinates. One can find such formulas on the >> internet, but in fact, I wasn't able to quickly find formulas if the >> conductivity is not constant. Now, obviously in this is simple example >> the result is obvious. But nevertheless, as an >> excersise, I wrote some notes how such things can be done using >> differential geometry, see the geom.ps referenced in the above wiki, >> or this link: >> >> http://github.com/certik/differential-geometry/tree/0552cdd5b99ebfb356c1d469f84314027cc3ffb0%2Fgeom.ps?raw=true >> >> See the section 3.1. I can imagine that converting more complex >> equation, or using other curvilinear coordinates such conversions >> quickly become very messy. Using my notes above, the task can be >> completely automated and it is in my TODO list to implement this in >> SymPy. >> >> --------- >> >> It'd be cool if we could do all the stuff in geom.ps in sympy. >> >> Ondrej >> >> > >> >> > Code below works for pretty printing, but not for latex. What am I doing > wrong? It is not clear to me how to refer to doprint for latex. One I > know the correct way to do the below I will start modifying LatexPrinter > to do the required formatting. On general philosophy with regard to > different types of printers I think there should be a global switch to > determine the type of printer and fomatting options for each type of > printer. To output one should always be able to just use print and str! > > > #!/usr/bin/python > #Printer.py > > import sympy > from sympy import * > from sympy.printing.pretty.pretty import PrettyPrinter > from sympy.printing.latex import LatexPrinter > > class Printer: > > printer_types = 0 > > normal = sympy.Basic.__str__ > > @staticmethod > def pretty(x): > return(PrettyPrinter().doprint(x)) > > @staticmethod > def latex(x): > return(LatexPrinter().doprint(x)) > > @staticmethod > def set(printer='normal'): > if Printer.printer_types == 0: > Printer.printer_types = {'normal':Printer.normal,\ > 'pretty':Printer.pretty,\ > 'latex':Printer.latex} > sympy.Basic.__str__ = Printer.printer_types[printer] > return > > Printer.set('pretty') > var('x') > print x**2+1 > > Printer.set('latex') > print x**2+1 > > > > >
Overload __repr__ not __str__ and it works. The default for sympy.printing.printer is the __str__ method, PrettyPrinter overloads this, LatexPrinter doesn't, which is reasonable. -- Andy --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
