% @(#)plot_desc.hlq	19.1 (ESO-IPG) 02/25/03 14:03:34 
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1990 European Southern Observatory
%.IDENT      plot_desc.hlq
%.AUTHOR     RHW, IPG/ESO
%.KEYWORDS   MIDAS, help files, PLOT/DESCRIPTOR
%.PURPOSE    On-line help file for the command: PLOT/DESCRIPTOR
%.VERSION    1.0  09-JUN-1987: RHW creation
%.VERSION    1.1  14-Mar-1991: RHW modified acc. to Verification Form
%----------------------------------------------------------------
\se
SECTION./DESC
\es\co
PLOT/DESCRIPTOR                                                09-JUN-1987  RHW
\oc\su
PLOT/DESCRIPTOR frame [descr] [start,end] [x_sc,y_sc[,x_off,y_off]]
	plot a descriptor on plotting device
\us\pu
Purpose:    
            Plot descriptor on the selected plotting device
\up\sy
Syntax:     
            PLOT/DESCRIPTOR frame [descr] [start,end] [x_sc,y_sc[,x_off,y_off]]
\ys\pa
            frame     = name of data frame
\ap\pa
            descr     = name of the descriptor. The decriptor should be of the
                        type integer, real or double precision;
                        default is HISTOGRAM
\ap\pa
            start,end = first and last data point to be plotted; end can
                        be smaller than start; defaults are the first and
                        the last valid data points in the descriptor.
\ap\pa
            x_sc,y_sc,x_off,y_off = scale or size in the x- and y-direction,
                        offset in the x- and y-direction. For the scaling x_sc
                        and y-sc, positive numbers are interpreted as scale
                        parameters (world units/mm), negative numbers as size
                        parameters (axis will be made sc_* mm. long). A
                        combination of a positive and negative number is
                        allowed. By default the plot fills the device area. \\
                        x_off and y_off determine the distance of the lower
                        left corner of the plot to the lower left corner of the
                        graphic device, measured in mm. By default, the plot
                        is put at the top left of the graphic device, allowing
                        space for the various labels.
\ap\no
Note:       
            The command is useful to plot data stored in a descriptor. 
            The maximum number of data points in the descriptor that can be
            plotted is 10000. With more data points one should use additional
            overplot commands.
\on\see
See also:   
            WRITE/DESCIPTOR, READ/DESCRIPTOR, COPY/DD, COPY/DK, COPY/KD
\ees\exs
Examples:
\ex
            PLOT/DESCRIPTOR myframe histogram 100,125
            This will plot the descriptor histogram associated with the image 
            myframe.bdf. Only the elements 100 to 125 will be plotted.
            The descriptor must exist. In this case, it should have been 
            created previously by the command STATISTICS/IMAGE myframe.
\xe \sxe
