On 3/8/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
> > That said, I would love to add a function that basically does the above
> > to SAGE, but it's unclear what the notation would even be. One idea
> > is this:
> >sage: f(w=3)
>
> in my actual situation, i have something like
>
> R1. = QQ
>
> The above code is a good idea, but there would be efficiency
> issues. It would be better to do this (see the ev function below).
>
> sage: R1. = QQ['w']
> sage: R2. = R1['z']
> sage: f = w*z + (1-w)*z^3 + 3
> sage: def ev(f, a):
> ...return f.parent()([c(a) for c in f.list()])
> sage: e
On 3/7/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
> > On 3/7/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
> >> . the question is: how do i evaluate w while leaving z untouched?
> >> (i actually want to do this when R1 is a multivariable ring, but i imagine
> >> it works the same way.)
> >>
> >
> > C
>
> On 3/7/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
>
>> . the question is: how do i evaluate w while leaving z untouched?
>> (i actually want to do this when R1 is a multivariable ring, but i imagine
>> it works the same way.)
>>
>
> Can't you just work with all the variables together, like:
On 3/7/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
> . the question is: how do i evaluate w while leaving z untouched?
> (i actually want to do this when R1 is a multivariable ring, but i imagine
> it works the same way.)
>
Can't you just work with all the variables together, like:
sage: P.=QQ['
