Things under legendu.net/outdated are outdated technologies that the author does not plan to update any more. Please look for better alternatives.

1. There are functions to add points, lines and legends to an existing plot in R. In SAS, there is no way to do this. What you can …

Things under legendu.net/outdated are outdated technologies that the author does not plan to update any more. Please look for better alternatives.

1. expand.grid creates a data frame from all possible combinations of supplied vectors or factors. For example,

   > expand.grid(letters[1:2], 1:3, c("+", "-"))
      Var1 Var2 …