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Abstract
I/O
Examples
Particulars
Required Reading
Version
Index_Entries

Abstract


   CSPICE_EKUCEI updates an integer column entry in a
   specified EK record.

   For important details concerning this module's function, please refer to
   the CSPICE routine ekucei_c.

I/O


   Given:

      handle   the scalar integer referring to an EK file open for
               write access.

      segno    the scalar integer indicating EK segment number
               of the record of interest.

      recno    the scalar integer identifying the index for record
               of interest.

      column   the string scalar name of the column for the
               record of interest.

      nvals    the integer number of entries from 'ivals' to update.

      ivals    an array of integer values containing the
               data values to update to the record in 'column'.

                  Note: 'nvals' specifies the number of 'ivals'
                  entries written to the updated record.

      isnull   a scalar boolean flagging whether the entry is null

   the call:

      cspice_ekucei, handle, segno, recno, `column`, $
                     nvals, ivals, isnull

   updates 'nvals' of 'ivals' to column 'column' in segment 'segno',
   record 'recno', of the EK file referred to by 'handle'.

Examples


   Any numerical results shown for this example may differ between
   platforms as the results depend on the SPICE kernels used as input
   and the machine specific arithmetic implementation.


      ;;
      ;; Constants
      ;;
      EKNAME = "ekucei.ek"
      IFNAME = "Test EK"
      NCOLS  = 2
      NROWS  = 6
      NRESVC = 0
      TABLE  = "MIXED_DATA"
      CVLEN  = 81
      MAXVAL = 10
      ivals  = intarr( MAXVAL )

      ;;
      ;; Open a new EK file.  For simplicity, we won't
      ;; reserve space for the comment area, so the
      ;; number of reserved comment characters is zero.
      ;; The constant IFNAME is the internal file name.
      ;;
      if ( cspice_exists (EKNAME) ) then begin
         file_delete, EKNAME
      endif

      cspice_ekopn, EKNAME, IFNAME, NRESVC, handle

      ;;
      ;;   Set up the table and column names and declarations
      ;;   for the MIXED_DATA segment.  We'll index all of
      ;;   the columns.  All columns are scalar, so we omit
      ;;   the size declaration.
      ;;
      cdecls = strarr(NCOLS)
      cnames = strarr(NCOLS)

      cnames[0] = "INT_COL_1"
      cdecls[0] = "DATATYPE = INTEGER, INDEXED  = TRUE,"+$
                  " NULLS_OK = TRUE"

      cnames[1] = "INT_COL_2"
      cdecls[1] = "DATATYPE = INTEGER, SIZE = VARIABLE,"+$
                  " NULLS_OK = TRUE"

      ;;
      ;; Start the segment.
      ;;
      cspice_ekbseg, handle, TABLE, NCOLS, cnames, cdecls, segno

      for i = 0, (NROWS-1) do begin

         cspice_ekappr, handle, segno, recno

         ivals[0] = i
         isnull   =  ( i EQ 1 )
         cspice_ekacei, handle, segno,  recno,  cnames[0], $
                        1,      ivals,  isnull

         ;;
         ;; Array-valued columns follow.
         ;;
         ivals[0] = 10*i
         ivals[1] = (10*i) + 1
         cspice_ekacei, handle, segno,  recno,  cnames[1], $
                        2,      ivals,  isnull

      endfor

      ;;
      ;; End the file.
      ;;
      cspice_ekcls, handle


      ;;
      ;; Open the EK for write access.
      ;;
      cspice_ekopw, EKNAME, handle

      ;;
      ;; Negate the values in the odd-numbered records
      ;; using the update routines."
      ;;
      for i = 1, (NROWS-1), 2 do begin

         recno    = i
         isnull   =  ( i EQ 1 )

         ivals[0] = -i
         cspice_ekucei, handle, segno,  recno,  cnames[0], $
                        1,      ivals,  isnull

         ;;
         ;; Array-valued columns follow.
         ;;
         ivals[0] = -(10*i)
         ivals[1] = -((10*i) + 1)
         cspice_ekucei, handle, segno,  recno,  cnames[1], $
                        2,      ivals,  isnull

      endfor

      ;;
      ;; End the file.
      ;;
      cspice_ekcls, handle


      ;;
      ;; Open the created file. Show the values added.
      ;;
      cspice_ekopr, EKNAME, handle

      for i = 0, (NROWS-1) do begin

         cspice_ekrcei, handle, segno, i, cnames[0], $
                        ivals, isnull

         if ( NOT isnull ) then begin
            print, 'Data from column: ',cnames[0],'   record number: ',i
            print, ivals
            print
         endif

         ;;
         ;; Array-valued columns follow.
         ;;
         cspice_ekrcei, handle, segno, i, cnames[1], $
                         ivals, isnull

         if ( NOT isnull ) then begin
            print, 'Data from column: ',cnames[1], '   record number: ',i
            print, ivals
            print
         endif

      endfor

      ;;
      ;; End the file.
      ;;
      cspice_ekcls, handle

   IDL outputs:

      Data from column: INT_COL_1   record number:        0
              0

      Data from column: INT_COL_2   record number:        0
              0           1

      Data from column: INT_COL_1   record number:        2
              2

      Data from column: INT_COL_2   record number:        2
             20          21

      Data from column: INT_COL_1   record number:        3
             -3

      Data from column: INT_COL_2   record number:        3
            -30         -31

      Data from column: INT_COL_1   record number:        4
              4

      Data from column: INT_COL_2   record number:        4
             40          41

      Data from column: INT_COL_1   record number:        5
             -5

      Data from column: INT_COL_2   record number:        5
            -50         -51

   Note record 1 does not appear due to setting the 'isnull' flag
   to true for that record.

   Notice the odd value record numbers have negative values
   as a result of the update calls.

Particulars


   None.

Required Reading


   ICY.REQ
   EK.REQ

Version


   -Icy Version 1.0.1, 13-JUN-2010, EDW (JPL)

      Minor edit to code comments eliminating typo.

   -Icy Version 1.0.0, 16-JUN-2003, EDW (JPL)

Index_Entries


   replace integer entry in an EK column




Wed Apr  5 17:58:01 2017