The R package is inspired by the SPSS and SAS macro created by Hayes. I don't have SPSS, and the "official" PROCESS package for R will only be released later in the year.
If someone knows how to make sense of the existing package, could you please help?
I read the vignette, and went through the reference manual, but those codes seem complicated, and I think a user would have to pick and choose different functions and lines of code to create the moderation model. That, unfortunately, is a little beyond my capabilities...