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      Procedure to print specified columns & rows of a FITS binary table

Calling Sequence

      TBPRINT, h, tab, columns, [ rows, TEXTOUT =, FMT=, NUM_HEADER= ]
      TBPRINT,tb_str, tab, columns, [ rows, TEXTOUT =, FMT=, NUM_HEADER = ]


      h - FITS header for table, string array
      tb_str - IDL structure extracted from FITS header by TBINFO, useful
          when TBPRINT is called many times with the same header
      tab - table array
      columns - string giving column names, or vector giving
              column numbers (beginning with 1). If string
              supplied then column names should be separated by comma's.
              If set to '*' then all columns are printed in table format
              (1 row per line, binary tables only).
      rows - (optional) vector of row numbers to print. If
              not supplied or set to scalar, -1, then all rows
              are printed.



Optional Input Keywords

      FMT = Format string for print display. If not supplied, then any
              formats in the TDISP keyword fields of the table will be
              used, otherwise IDL default formats.
      NUM_HEADER_LINES - Number of lines to display the column headers
              default = 1). By setting NUM_HEADER_LINES to an integer larger
              than 1, one can avoid truncation of the column header labels.
              In addition, setting NUM_HEADER_LINES will display commented
              lines indicating a FORMAT for reading the data, and a
              suggested call to readfmt.pro.
      NVAL_PER_LINE - The maximum number of values displayed from a multivalued
              column when printing in table format. Default = 6
      TEXTOUT - scalar number (0-7) or string (file name) determining
              output device (see TEXTOPEN). Default is TEXTOUT=1, output
              to the user's terminal

System Variables

      Uses nonstandard system variables !TEXTOUT and !TEXTOPEN
      Set !TEXTOUT = 3 to direct output to a disk file. The system
      variable is overriden by the value of the keyword TEXTOUT


      tab = readfits('test.fits',htab,/ext) ;Read first extension into vars
      tbprint,h,tab,'STAR ID,RA,DEC' ;print id,ra,dec for all stars
      tbprint,h,tab,[2,3,4],indgen(100) ;print columns 2-4 for
                                          first 100 stars
      tbprint,h,tab,text="stars.dat" ;Convert entire FITS table to
                                        ;an ASCII file named 'stars.dat'

Procedures Used



      (1) Program does not check whether output length exceeds output
              device capacity (e.g. 80 or 132).
      (2) Column heading may be truncated to fit in space defined by
              the FORMAT specified for the column. Use NUM_HEADER_LINES
              to avoid truncation.
      (3) Program does not check for null values
      (4) Does not work with variable length columns
      (5) Will only the display the first value of fields with multiple values
        (unless there is one row each with the same number of mulitple values)
        If printing in table format (column='*') then up to 6 values
        can be printed per line.


      version 1 D. Lindler Feb. 1987
      Accept undefined values of rows,columns W. Landsman August 1997
      Use new structure returned by TBINFO W. Landsman August 1997
      Made formatting more robust W. Landsman March 2000
      Use STRSPLIT to parse string column listing W. Landsman July 2002
      Wasn't always printing last row W. Landsman Feb. 2003
      Better formatting (space between columns) W. Landsman Oct. 2005
      Use case-insensitive match with TTYPE, use STRJOIN W.L. June 2006
      Fixed check for multiple values W.L. August 2006
      Fixed bad index value in August 2006 fix W.L Aug 15 2006
      Free-up pointers after calling TBINFO W.L. Mar 2007
      Add table format capability W.L. Mar 2010
      Add NUM_HEADER_LINE keyword P. Broos Apr 2010

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