Differences

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--- calculate_lookup_table [2011/07/26 19:09]
hermann created
+++ calculate_lookup_table [2011/11/30 20:36] (current)
hermann [Notes]
@@ Line 21: / Line 21: @@
 ===== Notes =====
-If the calculation of the expression diverges, the corresponding table key is not inserted in the output table.
+The table defined using the identifier 1, i.e. the table corresponding to "t1" in the calculation, is used to define the format of the resulting table.
-The list of mathematical and logical operators that can be employed in the logic/algebraic expression can be found in the [[Image Expression Type | image expression reference]].
+If the calculation of the expression diverges, the corresponding table key is not inserted in the output table. So, when possible way to remove a key from a table is returning //null//.
+The list of mathematical and logical operators that can be employed in the logic/algebraic expression can be found in the [[Image Expression Type | image expression reference]]. Note that the operators and functions described in [[Image Expression Type#Image Operators and Functions | Image Operators and Functions]]  and [[Image Expression Type#Image Neighborhood Functions
+| Image Neighborhood Functions]] can not be used in lookup table calculations.
 The tables used by the "Calculate Lookup Table" must be provided by a corresponding [[Number Table]] and the values must be provided by a corresponding [[Number Value]].
 ===== Internal Name =====