% @(#)plot_reds.hlq	17.1.1.1 (ESO-IPG) 01/25/02 17:16:05
% @(#)plot_lyma.hlq	8.1.1.3 (ESO-IPG) 12/5/94 17:42:55
% @(#)plot_lyma.hlq	8.1 (ESO-IPG) 11/28/94 10:28:15
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1993 European Southern Observatory
%.IDENT      plot_lyma.hlq
%.AUTHOR     PB, IPG/ESO
%.KEYWORDS   MIDAS, help files, 
%.PURPOSE    On-line help file for the command: PLOT/LYMAN
%.VERSION    1.0  23-NOV-95 : Creation, AF
%----------------------------------------------------------------
\se
SECTION./LYMAN
\es\co
PLOT/LYMAN					      23-NOV-95  AF
\oc\su
PLOT/REDSHIFT  [spectrum] [z/lamcen] [size] [label1,..] [session]
	    Plots a spectrum in the velocity space.
\us\pu
Purpose:    
	    Plots a spectrum table at different wavelengths, on a multiple
            window in the FIT/LYMAN fashion.\\
	    Data are plotted as a function of the velocity 
	    respect to a central redshift.
  	    The number of windows is given by the the numbers of labels,
  	    which specify the transitions to be displayed.

\up\sy
Syntax:     
            PLOT/REDSHIFT [spectrum] [z/lamcen] [size] [label1,..] [session]
 \\
\ys\pa
	    spectrum = spectrum table to be plotted\\
			Default is the SPECTAB keyword.	
 \\
\ap\pa
	    z/lamcen   = central redshift for each plot window.
 			If a value larger than 100 is given, assumed
			Default are the last plotted wavelengths, as stored
 			in LYPAR.tbl
 \\
\ap\pa
	    size     = sizes of each plot window, in km/s
			If [z/lamcen] is specified, no default is assumed.
			Otherwise, default are the sizes stored in LYPAR.tbl
 \\
\ap\pa
	    label    = labels of each plot window, separated by commas. 
			Meaningful only if [lamcen1,..] is specified:
			otherwise, default are the sizes stored in LYPAR.tbl
                        This parameter is used to set
                        the number of windows and the ionic transitions to be 
			displayed. Labels must be identical to those
			in the column :TRANSITION of  table atompar.tbl
 \\
\ap\pa
	    session =  FIT/LYMAN session to load.
			Defalut is current session as defined in the LYPAR 
			table.
			This parameter overrides the previous ones.
 \\
\ap\sa
See also: 
	    FIT/LYMAN,CURSOR/LYMAN,PLOT/LYMAN

\as\no

	    SET/GRA options has no effect on this command. 
	    Other options for the graphic set-up may be changed from
     	    the FITLYMAN program
	    This command modify also the default values for the 
	    PLOT/LYMAN command. Subsequent call to PLOT/LYMAN 
	    displays the same plot regions shown by the last
            PLOT/REDSHIFT, but in the wavelenght space.

 \\
\on\exs
Examples:
\ex
            PLOT/REDSHIFT
	        Plots the last spectrum fitted.
\xe\ex
            PLOT/REDSHIFT emmispe 3.1 300 Ly_a,Ly_b,CIV_1548,CIV_1550
            	Plots the spectrum emmispe (FITLYMAN format) on 4 windows, 
                at wavelengths chose in order to show a z=3.1 metal system.
\xe\ex
            PLOT/REDSHIFT spec2 ? ? ? ? MgII
            	Plots the spectrum spec2 at the wavelengths specified
		by a session called MgII, previously saved within FIT/LYMAN.
\xe \sxe