NAME: UNDEFINE PURPOSE: The purpose of this program is to delete or undefine an IDL program variable from within an IDL program or at the IDL command line. It is a more powerful DELVAR. AUTHOR: FANNING SOFTWARE CONSULTING David Fanning, Ph.D. 1642 Sheely Drive Fort Collins, CO 80526 USA Phone: 970-221-0438 E-mail: davidf@dfanning.com Coyote's Guide to IDL Programming: http://www.dfanning.com CATEGORY: Utilities. CALLING SEQUENCE: UNDEFINE, variable REQUIRED INPUTS: variable: The variable to be deleted. Up to 10 variables may be specified as arguments. SIDE EFFECTS: The variable no longer exists. EXAMPLE: To delete the variable "info", type: IDL> Undefine, info MODIFICATION HISTORY: Written by David Fanning, 8 June 97, from an original program given to me by Andrew Cool, DSTO, Adelaide, Australia. Simplified program so you can pass it an undefined variable. :-) 17 May 2000. DWF Simplified it even more by removing the unnecessary SIZE function. 28 June 2002. DWF. Added capability to delete up to 10 variables at suggestion of Craig Markwardt. 10 Jan 2008. DWF.