Hi, I created a principal component plot using the first two principal components. I used the function princomp() to calculate the scores. now, I would like to superimpose an ellipse representing the center and the 95% confidence interval of a series of points in my plot (as to illustrate the grouping of my samples).
I looked at the ellipse() function in the ellipse package but can't get it to work. the princomp()-function gives me the scores of each point, so I can calculate the mean and the 95%-CI, but I can't integrate this into the ellipse()-function). Is there a better way of doing this or can someone help me figure out this function? best regards, Lukas ______________________________________________ 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.
