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gams:error_set_used_in_ord_or_lag_is_not_ordered [2008/10/15 14:17]
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-====== Error: Set used in '​ord'​ or lag is not ordered. ====== 
  
-The ordering properties of a set can depend on the data in the set, and not on use.  I am attaching an example, with comments, that should make this clear. Note: The functions ''​sameas'',​ ''​.pos'',​ and ''​.val''​ will also work, if the set is not ordered. 
-<​code>​ 
-* $ontext 
-* Here, the set '​big'​ is not ordered; this is because the 
-* elements in it have already appeared (in the sets even and odd), 
-* but appeared in the order 0, 2, 4, 1, 3, 5, 
-* not 0, 1, 2, 3, 4, 5 
-* Thus you will get an error message with the code below: 
-* 198   Set used in '​ord'​ or lag is not ordered. 
-*         Hint: Some of the elements of the set were used before this 
-*         was initialized and the order was different from the order used 
-*         in this set. Try to initialize the set earlier. 
- 
-SETS 
-  even  / 0, 2, 4 /, 
-  odd   / 1, 3, 5 /, 
-  big   / 0 * 5 /; 
-* $offtext 
- 
- 
-$ontext 
-* Here, the set '​big'​ is ordered 
-* and the elements in even and odd occur in this same order, 
-* so they are ordered as well. 
-SETS 
-  big   / 0 * 5 /, 
-  even  / 0, 2, 4 /, 
-  odd   / 1, 3, 5 /; 
-$offtext 
- 
- 
-parameter oo(big); 
-oo(big) = ord(big); 
-display oo; 
-</​code>​ 
IMPRESSUM / LEGAL NOTICEPRIVACY POLICY gams/error_set_used_in_ord_or_lag_is_not_ordered.1224073022.txt.gz ยท Last modified: 2008/10/15 14:17 by support