As suggested by somebody else, uniroot() can be used to solve equations in one unknown variable. However, you will never get the "exact x" in R, only an approximate root...
Best, Giovanni > Date: Sat, 07 Feb 2009 02:20:10 -0800 (PST) > From: oryie <43248...@qq.com> > Sender: r-help-boun...@r-project.org > Precedence: list > > > Hello! > > I want to use R to calculate the variable x which is in some eqation, give > an example: > > 3*x-log(x)+1=0, > > how to solve equation to get the exact x in R? > > Thank you very much! > -- > View this message in context: > http://www.nabble.com/R-solve-equation-tp21886831p21886831.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > -- Giovanni Petris <gpet...@uark.edu> Associate Professor Department of Mathematical Sciences University of Arkansas - Fayetteville, AR 72701 Ph: (479) 575-6324, 575-8630 (fax) http://definetti.uark.edu/~gpetris/ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
