indicate if an element can be found in another vector in R : <p>two vectors (a,b) of type integer. 'b' is smaller than 'a'.
I need a logical vector for 'a', indicating if a specific element of 'a' is part of 'b'. </p>

<p>Is there a economic solution similar to '%in%' (which can not serve here)? Thanks in advance!</p>
