Stephane Dray biomserv.univ-lyon1.fr> writes:
:
: Hello,
: I have search on R website but do not find any solution.
: I would like to know if R has some functionalities to produce analytical
results
: of equation. or more generally if it contains some functions to simplify
equation.
:
: For ex
Stephane Dray wrote:
For example:
I would like to obtain x1 from:
x1+x2=8 (x1=8-x2)
x1^2+x2=8 (x1=sqrt(8-x2))
Is is possible in R ? if not, do you know a (free) software that could do the job ?
You want a computer algebra system. Try 'maxima', free, and from here:
http://maxima.sourceforge.net/
What would be the purpose of a function/software to rewrite x1 in terms
of x2 ? Perhaps you could explain further how it might be of some use.
There is uniroot(), polyroot(), optimize(), nlm(), solve() and many
others that you want to look into.
On Fri, 2004-07-09 at 17:07, Stephane Dray wrote:
>
Hello,
I have search on R website but do not find any solution.
I would like to know if R has some functionalities to produce analytical results
of equation. or more generally if it contains some functions to simplify equation.
For example:
I would like to obtain x1 from:
x1+x2=8 (x1=8-x2)
x1^2+
