I'm stuck again. Are rings something that will be more transparent in future versions, or must I learn them :)
sage: x = polygen(RR,'x') sage: f = exp(x) <type 'exceptions.TypeError'>: cannot coerce nonconstant polynomial to float Brian On 5/7/07, William Stein <[EMAIL PROTECTED]> wrote: > > On 5/7/07, Brian & Caitlin Harris <[EMAIL PROTECTED]> wrote: > > > > I was just asking about the recommended way to solve some general > > problems. You've answered my question by saying that maxima will be > > more transparent in the future. > > > > By the way, it's unintuitive that this should give an error in SAGE: > > f =x - 3.3 > > > > <type 'exceptions.TypeError'>: unsupported operand parent(s) for '-': > > 'Univariate Polynomial Ring in x over Rational Field' and 'Real Field > > with 53 bits of precision' > > > > What's the workaround? > > (a) wait for sage-2.5 in which you get: > > sage: f = x - 3.3 > sage: f > x - 3.30000000000000 > > (b) Today: > > sage: x = polygen(RR,'x') > sage: f = x - 3.3 > sage: f > 1.00000000000000*x - 3.30000000000000 > > > > --~--~---------~--~----~------------~-------~--~----~ 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/ -~----------~----~----~----~------~----~------~--~---
