Uwe Ligges wrote: > > > Paul Lynch wrote: >> I've made some normal plots of my data using qqplot, and now >> I would like to fit a line to the points on the plot and >> check the correlation coefficient to have a more objective measure >> of how straight the line is. Is there a simple way of doing that? >> (I'm still pretty new to R.) > > > See ?qqplot and what its value is: > > x <- rnorm(10) > y <- rnorm(10) > qq <- qqplot(x, y) > cor(qq$x, qq$y)
I forgot to finish: for fitting a line based in least squares, you can go on: fit <- lm(y ~ x, data = qq) summary(fit) abline(fit) Uwe Ligges ______________________________________________ R-help@stat.math.ethz.ch 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.
