GenerateIndexArray Task
This task generates an array of numbers.
Example
; Start the application
e = ENVI(/HEADLESS)
; Get the task from the catalog of ENVITasks
Task = ENVITask('GenerateIndexArray')
; Define task inputs
Task.MIN = 3
Task.MAX = 10
; Run the task
Task.Execute
; Print the resulting array
Print, Task.OUTPUT_ARRAY
Result:
3.0000000 4.0000000 5.0000000 6.0000000 7.0000000 8.0000000 9.0000000 10.0000000
See More Examples below.
Syntax
Result = ENVITask('GenerateIndexArray')
Input properties (Set, Get): INCREMENT, MAX, MIN, N_ELEMENTS, REVERSE
Output properties (Get only): OUTPUT_ARRAY
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:
This task also contains the following properties:
INCREMENT (optional)
Enter the desired increment between consecutive values.
MAX (optional)
Enter the maximum value of the array.
MIN (optional)
Enter the mimimum value of the array.
N_ELEMENTS (optional)
Specify the number of elements in the resulting array.
OUTPUT_ARRAY
The resulting array of numbers.
REVERSE (optional)
Set this property to reverse the order of the output elements.
More Examples
Example 2
Task = ENVITask('GenerateIndexArray')
Task.MIN = -1
Task.MAX = 0
Task.INCREMENT = 0.2
Task.Execute
Print, Task.OUTPUT_ARRAY
Result:
-1.0000000 -0.80000000 -0.59999999 -0.39999999 -0.19999999 1.4901161e-008
Example 3
Task = ENVITask('GenerateIndexArray')
Task.MIN = 10
Task.MAX = 20
Task.INCREMENT = -5
Task.Execute
Print, Task.OUTPUT_ARRAY
Result:
20.000000 15.000000 10.000000
Example 4
Task = ENVITask('GenerateIndexArray')
Task.MIN = 0
Task.MAX = 15
Task.N_ELEMENTS = 4
Task.Execute
Print, Task.OUTPUT_ARRAY
Result:
0.00000000 5.00000000 10.00000000 15.00000000
Example 5
Task = ENVITask('GenerateIndexArray')
Task.MIN = -3
Task.MAX = 2
Task.N_ELEMENTS = 3
Task.Execute
Print, Task.OUTPUT_ARRAY
Result:
-3.0000000 -1.0000000 1.0000000
Example 6
Task = ENVITask('GenerateIndexArray')
Task.MAX = 150
Task.NELEMENTS = 4
Task.INCREMENT = 10
Task.Execute
Print, Task.OUTPUT_ARRAY
Result:
120.00000 130.00000 140.00000 150.00000
Example 7
Task = ENVITask('GenerateIndexArray')
Task.MIN = 10
Task.MAX = 20
Task.INCREMENT = 2
Task.REVERSE = 1
Task.Execute
Print, Task.OUTPUT_ARRAY
Result:
20.000000 18.000000 16.000000 14.000000 12.000000
Example 8
Task = ENVITask('GenerateIndexArray')
Task.MIN = 10
Task.MAX = 20
Task.INCREMENT = 3
Task.Execute
Print, Task.OUTPUT_ARRAY
Result:
10.000000 13.000000 16.000000 19.000000
Version History
|
ENVI 5.5. 1 |
Introduced |
API Version
4.2