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LINES

        FIT\LINES [N] [/NOCURSOR] [/INPUT File_Name]

    Enter  the  initial  values  for the profile fit.  If argument "AUTO" is
    given instead of a number, then the number of lines found  in  the  last
    read spectrum will be used for ITERATE command.

    If  N  is  not specified, then the last value for N is used.  If N is 0,
    MINIMIZE will attempt to guess initial values for a single line by  com-
    puting  the  moments  of the spectrum.  If N is not 0, LINES prompts for
    the initial values for line parameters. N is limited to 5. These  values
    should  be  separated by spaces and can be entered as SIC expressions as
    follows:

    Method   Code,Value     Code,Value   Code,Value     Code,Value

    GAUSS    Temperature    Position     Width

    SHELL    Area (K.MHz)   Offset (MHz) Width (MHz)    Horn/Center

    NH3      Temperature    Position     Width (MHz)    Opacity

    HFS      Temperature    Position     Width (MHz)    Opacity

    The code is an integer interpreted as follows :
            0       adjustable parameter
            1       fixed parameter
            2       adjustable parameter (head of group)
            3       parameter fixed with respect to parameter coded 2 or 4
            4       fixed parameter (head of group)
    Codes 2 3 and 4 are used to fit dependent lines (e.g. HCN, for which the
    displacements  are  4.842  and -7.064 km/s, or -1.431 and 2.088 MHz, and
    line ratios 1:0.6:0.2). Codes 0 and 1 only are allowed for  NH3  method.
    The  value for a parameter with code 3 should be either the ratio to the
    head of group value (for both intensity and width), or the  offset  from
    head of group (for the position).

    If  the  cursor  is available, you will have to define the boundaries of
    the N lines. The program then computes the moments of  the  spectra  be-
    tween  these  boundaries as input values. You cannot change the codes in
    this way which is meaningfull ONLY FOR FREE and INDEPENDENT lines.  This
    cursor selection is not used if you specify the /NOCURSOR option.

    Guesses  can  be  read from an input file using the /INPUT File_Name op-
    tion. "Free" format is used to read in this input file. The  first  line
    must  contain  the  number of lines, others are as the input at the key-
    board.

    Command LINES is not supported for method CONTINUUM.


Gildas manager 2011-09-07