cwhmisc (version 2.1)

is.constant: is.constant

Description

A numerical vector consists only of identical values

Usage

is.constant(x)

Arguments

x

a vector

Value

• TRUE if x is numerical and latex{$(x) = (x)${max(x) = min(x)}. identical, all.equal is.constant(rep(c(sin(pi/2),1),10)) # TRUE x <- factor(c(1,1,NA)) is.constant(x) # FALSE because of NA is.constant(x[1:2]) # TRUE is.constant(c(1,1,NA)) # FALSE because of NA is.constant(c(1,1,2)) # FALSE is.constant(c(1,1,1)) # TRUE [object Object],[object Object],[object Object] logic