I am a novice R user. I would like to be able to graph some simple piecewise functions/functions with domain restrictions in R, but I'm having trouble defining such functions. For example, I would like to define the following function:
f(x)={x^2 if -1<x<x; 1 if 2<x<3} Notably, the function is undefined outside of domain (-1,1)U(2,3). My best attempt in R is something like this: f<-function(x) ifelse(-1<x & x<1,x^2,ifelse(2<=x & x<=3,1,as.null())) This approach works fine for values within the domain. But, naturally, when I try values outside of the domain I get an error. Consequently, when I try to graph such a function: plot(f) I get the following error: Error in ifelse(2 <= x & x <= 3, 1, as.null()) : replacement has length zero I realize that I could create vectors of x-y points and plot using the plot(x,y) command, but it seems to me that I should be able to define a piecewise function symbolically and just graph it. Am I wrong? Any help would be greatly appreciated. -- View this message in context: http://r.789695.n4.nabble.com/Simple-question-regarding-domain-restrictions-piecewise-functions-in-R-tp4504199p4504199.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.