Hi I'm very new to R but have plenty of experience with statistics and other packages like SPSS, SAS etc.
I have a dataset of around 20 columns and 200 rows. I'm trying to fit a very simple linear model between two variables. Having done so, I want to test the model for heteroscedasticity using the Breusch-Pagan test. Apparently this is easy in R by simply doing bptest(modelCH, data=KP) I've tried this but I'm told it cannot find function bptest. It's here where I'm struggling. I'm probably wrong but as far as I can see, bptest is part of the lm package which, as far as I know, I have installed. Irrespective of the fact I'm not sure how to tell bptest which is the dependent and explanatory variables - there's a more fundamental problem if it can't find the bptest function. I have searched the documentation - albeit briefly so if anyone could help I'd be very grateful Rob QBE Management -- View this message in context: http://r.789695.n4.nabble.com/bptest-tp2553506p2553506.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
