IDL provides powerful, core visualization and analysis functionality, and capabilities that allow data analysts and developers to leverage IDL's power in multiple software environments.

ENVI image analysis software is used to extract meaningful information from imagery to make better decisions.

References:

• Paper

• IDL and ENVI documentation

• Module Name: IDL or ENVI(see the modules page for more information)
• IDL and ENVI cannot be run on the Biowulf login node. Instead, allocate an interactive session as described, and run IDL/ENVI there.
• Licenses: There are 20 IDL licenses on Biowulf. Any single job requires 6 licenses, so at most 3 sessions can be run simultaneously with the Biowulf IDL licenses.
• Example files available in /usr/local/apps/Exelis/8.5_5.3/idl/examples

Allocate an interactive session and run the program.
Sample session (user input in bold):

[user@biowulf]$ sinteractive --license=idl:6
salloc.exe: Pending job allocation 46116226
salloc.exe: job 46116226 queued and waiting for resources
salloc.exe: job 46116226 has been allocated resources
salloc.exe: Granted job allocation 46116226
salloc.exe: Waiting for resource configuration
salloc.exe: Nodes cn3144 are ready for job

[user@cn3144 ~]$ module load IDL

[user@cn3144 ~]$  idl    #command-line session
IDL> x = FINDGEN(41)/10 - 2
IDL> gauss = EXP(-x^2)
IDL> myPlot = BARPLOT(x, gauss, TITLE='Gaussian Distribution', XTITLE='$\it x$', YTITLE='$\it f(x)$', YRANGE=[0,1.1])
IDL> myText = TEXT(0.75,0.85,'$\it f(x)=exp(-x^2)$', /DATA, FONT_SIZE=24)
IDL>myPlot.Save, "gaussian.png", BORDER=10, RESOLUTION=300, /TRANSPARENT
IDL> exit



[user@cn3144 ~]$ idlde # GUI interface






[user@cn3144 ~]$ exit
salloc.exe: Relinquishing job allocation 46116226
[user@biowulf ~]$