/* * call-seq: * dvector.cos! -> dvector * * Replace each entry x of _dvector_ with cos(x). * * a = Dvector[ 1.1, -2.2, 5.3 ] * a.cos! -> Dvector[ cos(1.1), cos(-2.2), cos(5.3) ] * a -> Dvector[ cos(1.1), cos(-2.2), cos(5.3) ] */ VALUE dvector_cos_bang(VALUE ary) {