[R] Put a normal curve on plot

I would like to be able to place a normal distribution surrounding the predicted values at various places on a plot. Below is some toy code that creates a scatterplot and plots a regression line through the data. library(MASS) mu - c(0,1) Sigma - matrix(c(1,.8,.8,1), ncol=2) set.seed(123) x -

Re: [R] Put a normal curve on plot

Something like this? library(MASS) mu - c(0,1) Sigma - matrix(c(1,.8,.8,1), ncol=2) set.seed(123) x - mvrnorm(50,mu,Sigma) dta - data.frame(x=x[,1],y=x[,2]) plot(x) fit - lm(y~x, data=dta) sfit - summary(fit) se - sfit$sigma abline(fit) yhat - predict(fit,data.frame(x=c(-1,0,1)),se.fit=TRUE)

Re: [R] Put a normal curve on plot

Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Doran, Harold Sent: Tuesday, October 31, 2006 6:26 AM To: R-help@stat.math.ethz.ch Subject: [R] Put a normal curve on plot I would like to be able to place a normal distribution surrounding the predicted values at various