How do I formulate an R related statement? -
    how write statement "between 0 , 15" r? transforming variable categorical variable, , requirement 1 of categories recode new categorical variable old variable (eg. x) becomes new.variable <- x between 0 , 15.   edit - clarification of question   i have been given data set , instruction are:   growth patterns generated transforming x variable new categorical variable, can named "growth". first category assigned islands in x variable between 15 50. question, main headache how write "between 15 50"  in r language. have:   growth$mediumgrowth.islands <- growth$sasiaurban.x[growth$sasiaurban.x ???]          it's not entirely clear me want achieve, believe want cut :   x <- 0:20 cut(x,c(-inf,3,9,18,inf)) # [1] (-inf,3]  (-inf,3]  (-inf,3]  (-inf,3]  (3,9]     (3,9]     (3,9]     (3,9]     (3,9]     (3,9]     (9,18]    (9,18]    (9,18]    (9,18]    (9,18]    (9,18]    # [17] (9,18]    (9,18]    (9,18]    (18, inf] (18, inf] # levels: (-inf,3] (3,...