note Fletch <c> ;; Presented with just about as much Perl as the OP . . . (ns sumcols (:use [clojure.contrib.str-utils :only (re-split)]) (:use [clojure.contrib.duck-streams :only (read-lines)])) (defn sumline [acc line] (loop [a acc l (map #(Float. %) (re-split #"\s+" line)) idx 0] (if (empty? l) a (recur (assoc a idx (+ (get a idx 0) (first l))) (rest l) (inc idx))))) (defn sumcols [filename] (loop [acc {} lines (filter #(> (count %) 0) (read-lines filename))] (if (empty? lines) (vals acc) (recur (sumline acc (first lines)) (rest lines))))) (println (sumcols (first *command-line-args*))) </c> <div class="pmsig"><div class="pmsig-58196"> <p> The cake is a lie.<br /> The cake is a lie.<br /> The cake is a lie.<br /> </p> </div></div> 892197 892197