Test for Numeric Argument
Test whether argument is numeric or a data.frame with numeric columns.
isNumeric(x)
x |
any object |
This function is used to check the validity of arguments for numeric functions. It is an attempt to emulate the behavior of internal generic math functions.
isNumeric differs from is.numeric in that data.frames with all columns numeric are accepted as numeric.
TRUE or FALSE
Gordon Smyth
isNumeric(3)
isNumeric("a")
x <- data.frame(a=c(1,1),b=c(0,1))
isNumeric(x) # TRUE
is.numeric(x) # FALSEPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.