Dear all, Below there are two, simple - I suppose, questions on using pmatch(): > pmatch("xx", c("cc","xxa")) [1] 2 > pmatch("a", c("cc","xxa")) [1] NA > pmatch("xx", c("cc","xxa","xxb")) [1] NA I would like that the second call returns also 2, and the third call returns c(2,3) is it possible? many thanks vito