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calculate_value [2026/07/04 23:47] hermann |
calculate_value [2026/07/07 16:11] (current) hermann |
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| ^ Name ^ Type ^ Description ^ | ^ Name ^ Type ^ Description ^ | ||
| - | | Expression | [[Image Expression Type]] | The algebraic or logical formula that evaluates to a single numeric result, written using the [[Image Expression Type|image expression editor]]. Must be enclosed in square brackets ''[ ]'' in EGO Script. | | + | | Expression | [[Image Expression Type]] | The algebraic or logical formula that evaluates to a single numeric result. Must be enclosed in square brackets ''[ ]'' in EGO Script. | |
| ===== Optional Inputs ===== | ===== Optional Inputs ===== | ||
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| ==== Available expression features ==== | ==== Available expression features ==== | ||
| - | Image operators (''iX''), the ''line'' and ''column'' spatial keywords, neighbourhood functions, neighbourhood indexing, and convolution are not available — there is no cell or row context. Available features are arithmetic and logical operators and lookup table queries (''tX[...]'') in all single-key and multi-column forms. See [[calculate_functors#the_expression_language|The Expression Language]] for the complete reference, or [[Image Expression Type]] for the navigable operator index. | + | Image operators (''iX''), the ''line'' and ''column'' spatial keywords, neighbourhood functions, neighbourhood indexing, and convolution are not available — there is no cell or row context. Available features are arithmetic and logical operators and table and lookup table queries (''tX[...]'') in all single-key and multi-column forms. See [[calculate_functors#the_expression_language|The Expression Language]] for the complete reference, or [[Image Expression Type]] for the navigable operator index. |
| ==== Null value handling ==== | ==== Null value handling ==== | ||
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| * [[calculate_functors#calculatevalue_examples|CalculateValue practical examples]] in the Calculate Functors documentation | * [[calculate_functors#calculatevalue_examples|CalculateValue practical examples]] in the Calculate Functors documentation | ||
| * [[lesson_8|Lesson 8: Inserting and getting a specific value into a table]] | * [[lesson_8|Lesson 8: Inserting and getting a specific value into a table]] | ||
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