# IBM Visualization Data Explorer User's Reference

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### SelectorList

Category

Interactor

Function

Generates a list of values and a strings based on user input.

Syntax

Available only through the user interface.

Inputs

Name | Type | Default | Description
--- | --- | --- | ---
`stringdata` | string list or group | no default | specifies or derives a list of potential output strings
`valuelist` | integer or string list or value list | 0-based list | list of potential output values
`cull` | flag | 0 | determines whether zero-length strings are removed (1) or not (0)
`label` | string | "Selector" | global name applied to interactor stand-ins

Outputs

Name | Type | Description
--- | --- | ---
`value` | string or value | value
`name` | string | string name

Functional Details

This module allows the user to interactively select zero, one, or more items from a list. Through inputs to the module (outputs from other tools or values set in its configuration dialog box) the interactor can be "data-driven."

If the interactor is not data-driven, its attributes are taken from its `Set Attributes...` dialog box (accessed from the `Edit` pull-down menu in the Control Panel).

This interactor requires a list of strings and a list of values or strings that are then paired up one-to-one and used as selectable outputs. The inputs to SelectorList are used to generate both lists. If there are no inputs, the module uses the values in its `Set Attributes...` dialog box.

`stringdata` | controls the string values that appear as output in `name`. It is required if the interactor is data-driven. If the parameter value is: a string list: the individual strings are used as potential outputs. a group: the names of the group members (or member1, member2, ...) are used as possible output names. a series group: the names are "position = n," (where n is the series position of each series member). In every case, the items in the resulting string list are displayed in the list of selections in the corresponding SelectorList interactor.
`valuelist` | is a list of potential output values. If this parameter is a value or string list, these values are mapped one-to-one onto the string list that results from `stringdata` input. If the interactor is data-driven, the parameter value can also be a single integer used to generate a list of integers beginning with that one. If the parameter is defaulted and the interactor is data-driven, the value list is a list of integers starting at 0 (zero).
`cull` | is specified only when the interactor is data-driven. It determines whether or not empty strings are culled from the string list that results from `stringdata` input. If set to 1, empty strings are removed.
`label` | is the global label of all instances of the corresponding interactor stand-in. An interactor instance's local label (set from the Control Panel) overrides a global label. If not specified, the global label is set by the user interface.

Example Visual Program

    InterfaceControl3.net

See Also

Integer, IntegerList, Scalar, ScalarList, Vector

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