Hello again, The question this time is using R how does one run a regression model and plot residuals on tabular data having columns x, G, A, S where x is the independent variable. The model is of the form y = b + G + A + S + GA + GS + AS + epsilon Thanks in advance swami *************************************************************************** The contents of this communication are intended only for the addressee and may contain confidential and/or privileged material. If you are not the intended recipient, please do not read, copy, use or disclose this communication and notify the sender. Opinions, conclusions and other information in this communication that do not relate to the official business of my company shall be understood as neither given nor endorsed by it. *************************************************************************** -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._