FTAB_DELROW

       Delete rows of data from a FITS ASCII or binary table extension

       ftab_delrow, filename, rows, EXTEN_NO =, NEWFILE = ]

       filename - scalar string giving name of the FITS file containing an
               ASCII or binary table extension.
       rows  -  scalar or vector, specifying the row numbers to delete
               First row has index 0.   If a vector, it will be sorted and
               duplicates will be removed

       EXTEN_NO - scalar integer specifying which extension number to process
               Default is to process the first extension
       NEWFILE - scalar string specifying the name of the new output FITS file
               FTAB_DELROW will prompt for this parameter if not supplied

       Compress the first extension of a FITS file 'test.fits' to include
       only non-negative values in the 'FLUX' column
       ftab_ext,'test.fits','flux',flux       ;Obtain original flux vector
       bad = where(flux lt 0)                 ;Find negative fluxes
       ftab_delrow,'test.fits',bad,new='test1.fits'  ;Delete specified rows

       Does not work for variable length binary tables

       FITS_CLOSE, FITS_OPEN, FITS_READ, FITS_WRITE, FTDELROW, TBDELROW

       Written   W. Landsman        STX Co.     August, 1997
       Converted to IDL V5.0   W. Landsman   September 1997
       Use COPY_LUN if V5.6 or later     W. Landsman   February 2003

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