Hi, I have a data y~x which looks like an inverse quardratic function, i.e. y=+/- sqrt(x). So for each x there are two y values due to the +/- operation. Do you know it is possible to fit a linear model on the data to fit such a model? How do I write the formula for this case?
Thanks for the help, Jing [[alternative HTML version deleted]] ______________________________________________ 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.