R, whether all the elements of X are present in Y

Question

In R, how do you test for elements of one vector NOT present in another vector?

X <- c(\'a\',\'b\',\'c\',\'d\')
Y <- c(\'b\', \'e\', \'a\',\'d\',\'c\',\'f\         


        

Answer 1

You can use all and %in% to test if all values of X are also in Y:

all(X %in% Y)
#[1] TRUE