Great! It works. It is exactly what I needed. By the way. If I execute
test.sage, sage creates a new file called sage.py. Is there a way to
prevent that?
On May 29, 9:45 am, davidloeffler <dave.loeff...@gmail.com> wrote:
> Another alternative: if you call your file "test.sage" rather than
> "test.py", and then do "sage test.sage" from the command line, it will
> be run as if you had typed all the corresponding commands in a Sage
> session, so you don't need the "from sage.all import *" line in
> Laurent's example above.
>
> David
>
> On May 29, 12:33 pm, Laurent <moky.m...@gmail.com> wrote:
>
> > Sage is a python module.
>
> > The following is an example which defines a class from which you can
> > manipulate functions :
>
> > -------------------------------------------------
>
> > #! /usr/bin/sage -python
> > # -*- coding: utf8 -*-
>
> > from sage.all import *
>
> > class MaClasse(object):
> > def __init__(self,exp):
> > self.sage = exp
> > self.sageFast = self.sage._fast_float_(x)
> > def Derr(self):
> > return MaClasse(self.sage.derivative())
> > def Evaluation(self,xe):
> > return numerical_approx(self.sageFast(xe))
>
> > var('x,y')
> > f = MaClasse(x**2+2)
>
> > print f.Derr().sage
> > print f.Derr().Evaluation(3)
> > print f.Evaluation(8)
>
> > --------------------------------------
>
> > Copy-paste it in a text file, make it executable, and enjoy !
>
> > Laurent
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