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get1Dindex_Collapse

Returns a one dimensional array of subscript indices that DO NOT match the values contained in a user specified list.

Prototype

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"  ; This library is automatically loaded
                                                             ; from NCL V6.2.0 onward.
                                                             ; No need for user to explicitly load.

	function get1Dindex_Collapse (
		x             [*] : numeric,  
		exclude_value [*] : numeric   
	)

	return_val  :  integer or long

Arguments

A one-dimensional array.

exclude_value

A one-dimensional array of the same type as x. Must exist in x.

Return value

A one-dimensional array containing index subscripts excluding those specified by exclude_value.

Description

Finds the indices in a one-dimensional array which do not match a user specified list of values. The values must exist in the array to be checked.

Examples

Example 1

Find the subscript indices which exclude the years specified by the user.

  load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
       ;
       ;
  year      = ispan(1985,2006,1)

  year_exc  = (/1985, 1989, 1999, 2005, 2006/)
  i         = get1Dindex_Collapse(year,year_exc)
     
  print("i="+i+  year(i)="+year(i))

The output would be:

     
        i=1    year(i)=1986
        i=2    year(i)=1987
        i=3    year(i)=1988
        i=5    year(i)=1990
        i=6    year(i)=1991
        i=7    year(i)=1992
        i=8    year(i)=1993
        i=9    year(i)=1994
        i=10   year(i)=1995
        i=11   year(i)=1996
        i=12   year(i)=1997
        i=13   year(i)=1998
        i=15   year(i)=2000
        i=16   year(i)=2001
        i=17   year(i)=2002
        i=18   year(i)=2003
        i=19   year(i)=2004

The following indices were excluded: