Exact to the degree that real numbers can be exactly expressed. Look into ?uniroot
You want to specify the function in a one-sided way, i.e., x/(1-exp(-x))-2.2 HTH, Daniel ------------------------- cuncta stricte discussurus ------------------------- -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of pinusan Sent: Wednesday, February 17, 2010 8:16 PM To: r-help@r-project.org Subject: [R] Solve equation using R Hello! I want to use R to calculate the variable x which is in some eqation, give an example: 2.2=x/(1-exp(-x)), how to solve equation to get the exact x in R? Thank you. Have a nice day. -- View this message in context: http://n4.nabble.com/Solve-equation-using-R-tp1559576p1559576.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. ______________________________________________ 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.
