countFactorLevels | R Documentation |
countFactorLevels
summarizes a data frame, a list, or a factor by
computing the number of declared and used factor levels in it (in
case of factors) or its constituents (in case of data frames and
lists).
countFactorLevels(x)
x |
a data frame, a list, or a factor |
a data frame having the columns of x
and two rows ('all',
'used') holding numbers of all (used) factor levels in
individual columns of x
Tomas Sieger
if (require(MASS)) {
countFactorLevels(Cars93)
# omitting the first row results in some levels of \code{Cars$Model} and
# \code{Cars93$Make} unused (and reported in the second row)
countFactorLevels(Cars93[-1L, ])
countFactorLevels(Cars93$Model[-1L])
}
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.