From: Adaikalavan Ramasamy <ramasamy_at_cancer.org.uk>

Date: Sat 10 Jul 2004 - 02:44:15 EST

R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jul 10 02:55:10 2004

Date: Sat 10 Jul 2004 - 02:44:15 EST

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+x2=8 (x1=sqrt(8-x2))
**>
**>
**>
**> Is is possible in R ? if not, do you know a (free) software that could do the job ?
**>
**> Thanks in advance !
**>
**> Stephane DRAY
**>
**> ______________________________________________
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**> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
**> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
**>
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R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jul 10 02:55:10 2004

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