Jaap is right: Compare
[EMAIL PROTECTED] ---------------------------------------------------------------------- | SAGE Version 2.9.3, Release Date: 2008-01-05 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: f(x) = -x Exiting SAGE (CPU time 0m0.01s, Wall time 0m15.78s). with [EMAIL PROTECTED] ---------------------------------------------------------------------- | SAGE Version 2.9.3, Release Date: 2008-01-05 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: f(x) =-x ------------------------------------------------------------ File "<ipython console>", line 1 <type 'exceptions.SyntaxError'>: can't assign to function call (<ipython console>, line 1) John On 14/01/2008, Jaap Spies <[EMAIL PROTECTED]> wrote: > > William Stein wrote: > > On 1/14/08, Jason Grout <[EMAIL PROTECTED]> wrote: > > >> I noticed that the following gives an error in Sage 2.9: > >> > >> sage: f(x)=-x > >> ------------------------------------------------------------ > >> File "<ipython console>", line 1 > >> <type 'exceptions.SyntaxError'>: can't assign to function call (<ipython > >> console>, line 1) > >> > >> Is that a bug? It seems to be related to the negative sign, since the > >> following works: > >> > >> sage: f(x)=(-x) > >> sage: f(2) > >> -2 > > > > Was there something funny about your x in the above example, > > because it works fine for me: > > > > teragon:standard was$ sage > > ---------------------------------------------------------------------- > > | SAGE Version 2.9.3, Release Date: 2008-01-05 | > > | Type notebook() for the GUI, and license() for information. | > > ---------------------------------------------------------------------- > > > > sage: f(x) = -x > > sage: f(2) > > -2 > > > > Could it be related to the spaces around '='? > > Jaap > > > > > -- John Cremona --~--~---------~--~----~------------~-------~--~----~ 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/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
