VertexRemover

This port contains the attribute _num_removed, which will contain the number of coordinates actually removed.  (This could be less than the number specified if the feature did not have that many coordinates between the specified index and the end of the feature.)

This parameter specifies how coordinates are chosen for removal.

• If you choose Remove, then, starting at the index specified, the transformer will remove the number of coordinates given in Number to Keep/Remove.  
• If you choose Keep, then all coordinates except those specified will be removed.

A negative index can be used to indicate the position of the coordinate(s) to be removed relative to the end of the feature (-1 is the last coordinate, -2 the second last, and so on). The index can be entered as an integer, or may be taken from the value of another attribute by selecting its name from the pull-down list of attributes.

If you choose Remove in the Keep or Remove Coordinates parameter above, then, starting at the index specified, the transformer will remove the number of coordinates that you specify in this parameter.  

If you choose Keep in the Keep or Remove Coordinates parameter above, then all coordinates except those specified will be removed.

Using the Text Editor

The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.

Text Editor

Using the Arithmetic Editor

The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.

Arithmetic Editor

Conditional Values

Set values depending on one or more test conditions that either pass or fail.

Parameter Condition Definition Dialog

Content

Expressions and strings can include a number of functions, characters, parameters, and more.

When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.

Content Types

String Functions	These functions manipulate and format strings.
Special Characters	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Date/Time Functions	Date and time functions are available in the Text Editor.
Math Operators	These operators are available in the Arithmetic Editor.
FME Feature Functions	These return primarily feature-specific values.
FME Parameters	FME and workspace-specific parameters may be used.
Creating and Modifying User Parameters	Create your own editable parameters.

Note: Not all tools are available in all transformers.