On Sat, May 9, 2009 at 7:12 AM, Laurent Claessens <moky.m...@gmail.com> wrote:
>
> I half-answer to myself :
>
>
>> 1. be able to convert a string into a function on which I can use Sage
>
> s = "x**3"
> var('x')
> f = eval(s)
> print f(3)
>
> makes the job
>
>> 2. from the results of Sage (especially from diff(f,x)), I need a
>> string that I can manipulate with Python (especially use the .replace
>> method in order to produce strings that are valid code for pstricks).
>
> s = "x**3"
> var('x')
> f = eval(s)
> print f(3)
> g = diff(f,x)
> print g
>
> I would like to get the string "3*(x**2)" or something like that.
Is
sage: str(latex(g))
'{3 {x}^{2} }'
what you want?
>
> Thanks for any ideas
> Laurent
>
>
>
> >
>
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