On Wednesday 26 October 2005 10:55, Giannitrapani, Marco GSUK-GSSC wrote: > Hi all! > > Does anyone knows if it exists a "symbolic math" package in R, that allows > to compute derivatives, integrals, etc.? > > Does exist a freeware version of Maple? > > Cheers, > > Marco > I've just learned yesterday the use of "expressions" objects to compute derivatives. There might be functions for doing integrals as well.
1) define an expression using whatever symbol you like example: > exp1 <- expression(cos(x)+sin(y)) 2) Use function D() to perform symbolic derivatives: example: > D(exp1,"x") -sin(x) > D(exp1,"y") cos(x) You can find this stuff in "R for Beginners", by Emmanuel Paradis (http://www.r-project.org/) Cheers, J -- Dr James Foadi PhD York Structural Biology Laboratory (YSBL) Department of Chemistry University of York Heslington York YO10 5YW UK ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
