calc-vec.el (math-vector-avg): Put the vector elements in order

before computing the averages.

lisp/ChangeLog

+2010-05-17  Jay Belanger  <jay.p.belanger@gmail.com>
+
+	* calc/calc-vec.el (math-vector-avg):  Put the vector elements in
+	order before computing the averages.
+
 2010-05-16  Jay Belanger  <jay.p.belanger@gmail.com>
 
 	* calc/calc-vec.el (calc-histogram):

lisp/calc/calc-vec.el

@@ -1178,7 +1178,7 @@
 ;;; Replace a vector [a b c ...] with a vector of averages
 ;;; [(a+b)/2 (b+c)/2 ...]
 (defun math-vector-avg (vec)
-  (let ((vp (cdr vec))
+  (let ((vp (sort (copy-sequence (cdr vec)) 'math-beforep))
         (res nil))
     (while (and vp (cdr vp))
       (setq res (cons (math-div (math-add (car vp) (cadr vp)) 2) res)