QueryTask Task

This task returns a hash that describes the properties of a selected ENVITask.

Example

; Start the application

e = ENVI(/HEADLESS)

; Get the task from the catalog of ENVITasks

Task = ENVITask('QueryTask')

; Provide inputs

Task.Task_Name = 'SpectralIndex'

; Run the task

Task.Execute

; Print the task parameters

Print, Task.DEFINITION

Syntax

Result = ENVITask('QueryTask')

Input properties (Set, Get): TASK_NAME

Output properties (Get only): DEFINITION

Properties marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Properties marked as "Get" are those whose values you can retrieve but not set.

Methods

This task inherits the following methods from ENVITask:

Properties

This task inherits the following properties from ENVITask:

COMMUTE_ON_DOWNSAMPLE

DEFINITION

An ENVITaskInfo hash that describes the properties of an ENVI task.

TASK_NAME (required)

A string with a selected task name to query. Use one of the following options to get a list of task names:

See the ENVITask help topic
Use the QueryTaskCatalog task as follows:

IDL> e = ENVI(/headless)

ENVI> Task = ENVITask('QueryTaskCatalog')

ENVI> Task.Execute

ENVI> Print, Task.TASKS, FORMAT='(A)'

Print the ENVI.Task_Names property as follows:

IDL> e = ENVI(/headless)

ENVI> Tasks = e.Task_Names

ENVI> Print, Tasks, FORMAT='(A)'

Version History

ENVI 5.3	Introduced
ENVI 5.3 SP2	DEFINITION returns a ENVITaskInfo hash

API Version

4.2