Description Usage Arguments Examples
xtabs requires two arguments (na.action and exclude) to show missing values along with other values. This function defaults to including missings and has only one argument
1 |
x |
passed to xtabs if it is a formula, transformed into a formula if it's a single object |
... |
passed to xtabs |
exclude |
defaults to NULL (i.e. includes NA) |
1 2 |
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