On Wed, Jun 3, 2009 at 10:51 AM, moky <moky.m...@gmail.com> wrote:
> =====================================
>
> #! /usr/bin/sage -python
> # -*- coding: utf8 -*-
>
> from sage.all import *
>
> var('x')
> f(x)= 8
> print f.derivative()
>
> ===============================
This is a difference between Sage and Python -- "f(x) = 8" is not
valid Python. That's why it's not working in your script. To see
what "f(x)=8" really does, run the preparse command:
'__tmp__=var("x"); f = symbolic_expression(Integer(8)).function(x)'
Thus, you can do
x = var('x')
f = SR(8).function(x)
and have it behave exactly the same way as before (since SR(8) and
symbolic_expression(8) produce equivalent results).
--Mike
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support-unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~----------~----~----~----~------~----~------~--~---
