LFIND
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LFIND

            [WEEDS\]LFIND [SPECIES [FMIN FMAX]] [/SORTBY ORDER] [/ENERGY ENERGY]
        [/AIJ AMIN] [/ORIGIN OriginName]

        Find the lines within a frequency range and create  a  line  index.  The
        command  looks  for the lines between FMIN and FMAX (default is the fre-
        quency range covered by the current R spectrum) in the database selected
        with the USE IN command.

        Arguments:
            SPECIES  the name of the species. Default is "All".
            FMIN     the  minimum  frequency  in  MHz.  Default is the current R
                     spectrum minimum limit.
            FMAX     the maximum frequency in MHz.  Default  is  the  current  R
                     spectrum maximum limit.

        Options:
            /SORTBY   sort the lines according to ORDER, which can be any combi-
                      nation of "frequency", "energy" and "aeinstein",  and  all
                      the subsequent permutations.

            /ENERGY   refine  the  search to lines with upper level energy lower
                      than ENERGY, expressed in Kelvins.

            /AIJ      refine the search to lines  with  einstein  A  coefficient
                      greater than AMIN, expressed s-1.

            /ORIGIN   refine the search to lines originally from the named data-
                      base only.

        As an output, the structure LINES% will contain the content of the  cur-
        rent index. See HELP SELECT for details.