Hi Petr, Thank you so much for your help.
You're right, the issue was that I needed to center my predictors by adding the code 'na.rm=T': verbal.ability_C <- verbal.ability - mean(verbal.ability, na.rm=T) That removed the NA values from being included in my centering and allowed me to run the regressions. Again, I really appreciate your help. -- Jessica -- View this message in context: http://r.789695.n4.nabble.com/Vector-errors-and-missing-values-tp4437306p4446027.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.
