Hi @Rick_SAS,    You need at least two variables not set as covariates to get a plot (i.e. in my case, setting covariates to 15 will not plot anything at all).  Unfortunately, rsreg ONLY produces a quadratic plot(s) with the two (or more) variables you don't set as covariates (the final variables in the list)--it will not plot a surface using the linear results of the two terms as I desire.   To help visualize, I've attached the resreg quadratic output ("rsreg.png") and the corresponding linear plot (using SYSTAT; "systat.png").  I'd like to be able to make the linear plot in SAS as well.  Additional thoughts on how to accomplish this? ... View more