FTDELCOL

       Delete a column of data from a FITS table

       ftdelcol, h, tab, name

       h,tab - FITS table header and data array.  H and TAB will
               be updated with the specified column deleted

       name - Either (1) a string giving the name of the column to delete
               or (2) a scalar giving the column number to delete

       Suppose it has been determined that the F7.2 format used for a field
       FLUX in a FITS table is insufficient.  The old column must first be
       deleted before a new column can be written with a new format.
       flux = FTGET(h,tab,'FLUX')       ;Save the existing values
       FTDELCOL,h,tab,'FLUX'            ;Delete the existing column
       FTADDCOL,h,tab,'FLUX',8,'F9.2'   ;Create a new column with larger format
       FTPUT,h,tab,'FLUX',0,flux        ;Put back the original values

       Written   W. Landsman        STX Co.     August, 1988
       Adapted for IDL Version 2, J. Isensee, July, 1990
       Converted to IDL V5.0   W. Landsman   September 1997
       Updated call to new FTINFO   W. Landsman  May 2000

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