help

Get help on Xselect commands


Obtain help on the XSELECT commands, their syntax, and examples. Help uses the IHF interactive help facility. The optional topic list can be used to go directly to a particular topic and sub-topic. Once in help, typing ?? will summarise extra features and special characters that can be used within the IHF system.

To exit back to XSELECT, use an EOF, a /*, or type $<$CR$>$ until you leave the help facility.

Syntax:

xsel >  help <topic list>

Examples:

xsel >  help help

gives the text you are reading.

xsel >  help "commands extract"

gives the text for the extract command.




HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public

Last modified: Tuesday, 10-Jan-2023 11:03:01 EST

HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.