Tool Select by Numerical Expression
Selects records for which the expression evaluates to non-zero. The expression syntax is the same as the one for the table calculator. If an attribute field is selected, the expression evaluates only this attribute, which can be addressed with the letter 'a' in the expression formula. If no attribute is selected, attributes are addressed by the character 'f' (for 'field') followed by the field number (i.e.: f1, f2, ..., fn) or by the field name in square brackets (e.g.: [Field Name]).
Examples:
- f1 > f2
- eq([Population] * 2, [Area])
- Author: O.Conrad (c) 2013
- Menu: Table|Selection
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Table | Table, input | TABLE | - | - |
| Options | Attribute (*) | Table field | FIELD | attribute to be searched; if not set all attributes will be searched | - |
| Expression | Text | EXPRESSION | - | Default: a > 0 | |
| Use No-Data | Boolean | USE_NODATA | - | Default: 0 | |
| Method | Choice | METHOD | - | Available Choices: [0] new selection [1] add to current selection [2] select from current selection [3] remove from current selection Default: 0 | |
| (*) optional | |||||
Command-line
Usage: saga_cmd table_tools 18 [-TABLE <str>] [-FIELD <str>] [-EXPRESSION <str>] [-USE_NODATA <str>] [-METHOD <str>] -TABLE:<str> Table Table, input -FIELD:<str> Attribute Table field -EXPRESSION:<str> Expression Text Default: a > 0 -USE_NODATA:<str> Use No-Data Boolean Default: 0 -METHOD:<str> Method Choice Available Choices: [0] new selection [1] add to current selection [2] select from current selection [3] remove from current selection Default: 0