>  Docs Center  >  Libraries  >  Motley  >  MGH_NULL

MGH_NULL

MGH_NULL

Name


  MGH_NULL

Purpose


  This function defines a null value for each IDL data type.

Calling Sequence


  result = MGH_NULL(template)
  result = MGH_NULL(TYPE=type)

Positional Parameters


  template (input, any type & size)
    If this argument is present, then the null value assumes its type.

Keyword Parameters


  TYPE (input, numeric scalar)
    This keyword is used to specify the null value's type via IDL's
    type specifiers.

Return Value


  The function returns a scalar null value.
###########################################################################
  This software is provided subject to the following conditions:
  1. NIWA makes no representations or warranties regarding the
    accuracy of the software, the use to which the software may
    be put or the results to be obtained from the use of the
    software. Accordingly NIWA accepts no liability for any loss
    or damage (whether direct of indirect) incurred by any person
    through the use of or reliance on the software.
  2. NIWA is to be acknowledged as the original author of the
    software where the software is used or presented in any form.
###########################################################################

Modification History


  Mark Hadfield, 1997-05:
    Written.
  Mark Hadfield, 1999-12:
    Modified for IDL 5.3 constants.



© 2019 Harris Geospatial Solutions, Inc. |  Legal
My Account    |    Store    |    Contact Us