R: Not a vector

not.vector

R Documentation

Not a vector

Check if entry is not vector

not.vector(x)

`x`	vector entry

a boolean value to indicate if entry is vector

vect1 = list(r=1,t=3:10)
vect2 = LETTERS
not.vector(vect1) # FALSE
not.vector(vect2) # FALSE
if(not.vector(vect1)) message("yes") # NULL