Plot Commands

As described in Chapter 3, the MIDAS data structures include frames, masks, tables, catalogues, descriptors, and keywords. With the exception of the masks and catalogues, the plot package is able to plot the data stored in these structures. Data can be plotted with PLOT/ as well as with OVERPLOT/ commands. In the first case, MIDAS will start a complete new plot (e.g. a graphic terminal screen will be erased and old plotfiles will be deleted); in the latter one MIDAS will extend the existing plot information without erasing the results of previous plot commands.

In addition of the plot commands that enable the user to plot data command are available to produce coordinate box(es) within subsequently data can be overplotted, and commands to add text, symbols, and (grid) lines. An overview of the commands is given below.

PLOT/AXES	plot a box with tick marks, tick labels and axes labels
OVERPLOT/AXES	overplot a box with tick marks, tick labels and axes labels
PLOT/CONTOUR	plot contours of a two-dimensional image
OVERPLOT/CONTOUR	overplot contours of a two-dimensional image
PLOT/COLUMN	plot a column of an image
OVERPLOT/COLUMN	overplot a column of an image
PLOT/DESCRIPTOR	plot an entry in a descriptor
OVERPLOT/DESCRIPTOR	overplot an entry in a descriptor
PLOT/GRAY	plot gray scale map of a two-dimensional image
OVERPLOT/GRAY	overplot gray scale map of a two-dimensional image
PLOT/HISTOGRAM	plot a histogram of a table column or image
OVERPLOT/HISTOGRAM	overplot a histogram of a table column or image
PLOT/KEYWORD	plot the contents of a keyword
OVERPLOT/KEYWORD	overplot the contents of a keyword
PLOT/PERSPECTIVE	perspective plotting (3-dim.) of an image
PLOT/ROW	plot a row (line) of an image
OVERPLOT/ROW	overplot a row (line) of an image
PLOT/TABLE	plot table data
OVERPLOT/TABLE	overplot table data
OVERPLOT/ERROR	overplot table column containing errors
PLOT/VECTOR	plot vector map from two 2-dim. images with smoothing option
OVERPLOT/VECTOR	overplot vector map from two 2-dim. images with smoothing option
LABEL/GRAPHIC	plot text in an existing plot
OVERPLOT/LINE	overplot a line in an existing plot
OVERPLOT/SYMBOL	overplot a symbol in an existing plot
OVERPLOT/GRID	overplot a grid, by connecting tickmarks