Run test on columns.

Source: R/colClasses.R

Applies user function to head of each column. Good for determing things such as column class.

replyr_testCols(x, f, n = 6L)

Arguments

x

tbl or item that can be coerced into such.
f

test function (returning logical, not depending on data length).
n

number of rows to use in calculation.

Value

logical vector of results.

Examples


d <- data.frame(x=c(1,2),y=c('a','b'))
replyr_testCols(d,is.numeric)

#>     x     y 
#>  TRUE FALSE