Hi, I have three original curves as follows, n<-seq(20,200,by=10)
t<-c(0.1138, 0.1639, 0.2051, 0.2473, 0.2890, 0.3304, 0.3827, 0.4075, 0.4618, 0.4944, 0.5209, 0.5562, 0.5935, 0.6197, 0.6523, 0.6771, 0.6984, 0.7209, 0.7453) es<-c(0.3682, 0.4268, 0.5585, 0.6095, 0.7023, 0.7534, 0.8225, 0.8471, 0.8964, 0.9098, 0.9371, 0.9514, 0.9685, 0.9747, 0.9812, 0.9859, 0.9905, 0.9923, 0.9940) coves<-c(0.3793, 0.4935, 0.5472, 0.6366, 0.6882, 0.7578, 0.8058, 0.8457, 0.8783, 0.9019, 0.9212, 0.9417, 0.9558, 0.9662, 0.9732, 0.9802, 0.9828, 0.9881, 0.9896) matplot(n,cbind(coves,es,t),type ='l', col=c("red","blue","black"),xlab='n',ylab='power') I want power curves to be smooth (avoid sawtooth curve), I try the follows, ##Spline library(modreg) st<- smooth.spline(t) ses<- smooth.spline(es) scoves<- smooth.spline(coves) plot(scoves,col='red', type='l') lines(ses, col='blue',type='l') lines(st,col='black',type='l') The shapes are what I want, but I want x-axis consistent to the correspond to n. Does anyone know the solution? Thanks, Kate [[alternative HTML version deleted]] ______________________________________________ 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.