+;; Declare functions which are defined elsewhere.
+(declare-function calc-fit-s-shaped-logistic-curve "calc-nlfit" (arg))
+(declare-function calc-fit-bell-shaped-logistic-curve "calc-nlfit" (arg))
+(declare-function calc-fit-hubbert-linear-curve "calc-nlfit" (&optional sdv))
+(declare-function calc-graph-add-curve "calc-graph" (xdata ydata &optional zdata))
+(declare-function calc-graph-lookup "calc-graph" (thing))
+(declare-function calc-graph-set-styles "calc-graph" (lines points &optional yerr))
+(declare-function math-min-list "calc-arith" (a b))
+(declare-function math-max-list "calc-arith" (a b))
+
+
+(defun math-map-binop (binop args1 args2)
+ "Apply BINOP to the elements of the lists ARGS1 and ARGS2"
+ (if args1
+ (cons
+ (funcall binop (car args1) (car args2))
+ (funcall 'math-map-binop binop (cdr args1) (cdr args2)))))
+