Newbie question: plotting regression models
adelmaas at MUSC.EDU wrote:
Greetings. Is there any way to get R to take a regression model object and draw a plot of the regression function? How about overlaying that plot over a scatterplot of the actual data? Thanks in advance for any help anyone can provide. Aaron
Hi Aaron, What type of "regression function" are your referring to? Linear model? Non-linear model? The term "regression" is to ambiguous to really answer your question. However, typically you should be able to do something like: fit <- lm(y ~ x) yhat <- predict(fit) plot(x, y, ylim = range(c(y, yhat))) lines(x, yhat) If you are not using lm please provide more information than you already have. You should read "Introduction to R" or any of the recommended texts listed on the R website. Also read the posting guide. --sundar