##
## * ``dd`` - The divided difference f[xs(1), xs(2),...]
##
- addpath('../homework1/src');
+ if (exist('../homework1/src', 'dir'))
+ addpath('../homework1/src');
+ end
+
order = length(xs) - 1;
-
+
if (order < 0)
## Can't do anything here. Return nothing.
dd = NA;