+struct factor_statistics {
+
+ /* The values of the independent variables */
+ union value id[2];
+
+ /* The an array stats for this factor, one for each dependent var */
+ struct metrics *m;
+
+};
+
+
+/* Create a factor statistics object with for N dependent vars
+ and ID as the value of the independent variable */
+struct factor_statistics *
+create_factor_statistics (int n, union value *id0, union value *id1);