I would like to specify a model with all polynomial interaction terms between two variables, say, up to degree 6. For example, terms like a^6 + (a^5 * b^1) + (a^4 * b^2) + ... and so on. The documentation states
The ^ operator indicates crossing to the specified degree. so I would expect a model specified as y ~ (a+b)^6 to produce these terms. However doing this only returns four slope coefficients, for Intercept, a, b, and a:b. Does anyone know how to produce the desired result? Thanks in advance. -- View this message in context: http://r.789695.n4.nabble.com/Specify-model-with-polynomial-interaction-terms-up-to-degree-n-tp4635130.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.
