margins {reshape2} | R Documentation |
Given the variables that form the rows and columns, and a set of desired margins, works out which ones are possible. Variables that can't be margined over are dropped silently.
margins(vars, margins = NULL)
vars |
a list of character vectors giving the variables in each dimension |
margins |
a character vector of variable names to
compute margins for. |
list of margining combinations, or NULL
if none.
These are the combinations of variables that should have
their values set to (all)