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 parameters (Set, Get): TASK_NAME

Output parameters (Get only): DEFINITION

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

Input Parameters

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 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)'

Output Parameters

DEFINITION

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

Methods

Execute

Parameter

ParameterNames

Properties

Version History

ENVI 5.3	Introduced
ENVI 5.3 SP2	DEFINITION returns a ENVITaskInfo hash