Re: [R] plotting confidence intervals of regression line

you can use the newdata statement in the predict function, as in n<-50 x<-sample(40:70,n,rep=T) y<-.7*x+rnorm(n,sd=5) plot(x,y,xlim=c(20,90),ylim=c(0,80)) mylm<-lm(y~x) abline(mylm,col="red") newx<-seq(20,90) prd<-predict(mylm,newdata=data.frame(x=newx),interval = c("confidence"), level = 0.90,ty

[R] plotting confidence intervals of regression line

Hello, I am trying to generate a confidence interval (90 or 95%) of a regression line. This is primarily just for illustration on a scatter plot (i.e. I am trying to make this http://www.ast.cam.ac.uk/~rgm/scratch/statsbook/graphics/anima4.gif). I have been trying to use the predict.lm function,