Hi, I fitted a linear model: fit <- lm(y ~ a * b + c - 1 , na.action='na.omit')
Now I want to extract only the a * b effects with confidence intervals. Of course, I can just add the coefficients by hand, but I think there should an easier way. I tried with predict.lm using the 'terms' argument, but I didn't manage to do it. Any hints are appreciated, best, joerg ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
