/* * call-seq: * dvector.log -> a_dvector * * Returns of copy of _dvector_ with each entry x replaced by log(x). * * a = Dvector[ 1.1, -2.2, 5.3 ] * a.log -> Dvector[ log(1.1), log(-2.2), log(5.3) ] */ VALUE dvector_log(VALUE ary) {