mandel@forwiss.uni-passau.de (Luis Mandel) (02/20/91)
Try with this: (defun make-length-list (coord) (if (null coord) nil (cons (- (cadr (car coord)) (caar coord)) (make-length-list (cdr coord)) ) ) ) It is more or less the naive version. -- Luis Mandel Bayerisches Forschungszentrum mandel@forwiss.uni-passau.de Fuer Wissensbasierte Systeme Schiesstattweg 53A Innstrasse 33 W8390-Passau W8390-Passau Germany Germany Tel part:(0851) 7-2416 Tel ofic:(0851) 509-533 -- Luis Mandel mandel@forwiss.uni-passau.de