Both APL and R promote interactive exploratory programming. Both are strong in computational programming and intended primarily for domain experts, though over

Both APL and R promote interactive exploratory programming. Both are strong in computational programming and intended primarily for domain experts, though over the years APL has drifted more into a domain for developers. In my opinion, APL's array capabilities are far stronger and notation less noisy, i.e. less syntax and punctuation. R seems to have been developed with tools like Lex and Yacc and the language has a certain look and feel.