% @(#)plot_dist.hlq	17.1.1.1 (ESO-IPG) 01/25/02 17:53:25
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1993 European Southern Observatory
%.IDENT      plot_dist.hlq
%.AUTHOR     11-JUN-93, IPG/ESO
%.KEYWORDS   MIDAS, help files, 
%.PURPOSE    On-line help file for the command: PLOT/DISTORTION
%.VERSION    1.0  PB : Creation, 11-JUN-93
%----------------------------------------------------------------
\se
SECTION./DISTORTION
\es\co
PLOT/DISTORTION					   PB  11-JUN-93
\oc\su
PLOT/DISTORTION  wave  [delta]  [mode]
	Plot the fitted position of arc lines in wavelength/y-coordinate space.
\us\pu
Purpose:    
            The fitted positions of the line catalog are plotted in
            wavelength/y-coordinate space. The commands allows to check
            the regularity of the fitted dispersion relation along the
            y-axis. Both row-by-row and bivariate solutions can be 
            verified depending on the mode.
\up\sy
Syntax:     
            PLOT/DISTORTION   wave  [delta]  [mode]
\ys\pa
            wave   = Arc line wavelength. The wavelength must be chosen
                     from the line catalog (session keyword LINCAT).
\ap\pa
            delta  = Half-range in pixels of the wavelength space.
                     Default value is 0.5, which means that the full
                     graphic window represents one pixel on the spectrum.
\ap\pa
            mode   = Dispersion relation mode. Possible values: RBR, 2D
                     Allows to plot the row-by-row (RBR) or the bivariate (2D)
                     solution. Default is RBR.
\ap\sa
See also: 
            CALIBRATE/LONG, PLOT/DELTA, PLOT/RESIDUAL, PLOT/CALIBRATE
\as\no
Note:       
            mode = 2D can only be used if the session keyword TWODOPT
            is set to YES (i.e. if a bivariate dispersion solution has
            been estimated).
\on\exs
Examples:
\ex
            PLOT/DISTORTION  5008.645  0.1  2D
\xe \sxe