A more versatile form of the T-SQL count() function.

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Description

Implementation of T-SQL count and Excel COUNTIF functions. Shows the total number of elements in any number of data objects altogether or that match a condition.

Usage

1

Arguments

...

an arbitrary number of R objects

condition

a 1 argument condition

Examples

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count(c(NA,1,2))
count(c(NA,1,2),is.na)
count(c(NA,1,2),list('A',4),cbind(1,2,3))
count(c(NA,1,2),list('A',4),cbind(1,2,3),condition=is.character)