.This directory contains the Low Level plot modules and are to be 
 combined into the libsubplot.a
 ====================================================================
boxptw.c	Compute pixel to world coordinates
boxwtp.c	Compute world to pixel coordinates
getbdf.c	Extract data along a ROW, or along a COLUMN, from a 2-D FRAME
getdat.c	Extract a subimage from a FRAME and smoothes it (option)
getdev.c	Get logical device name for current graphics window
getfrm.c	Determine the size and position of the tickmarks along a axis
getproj.c	Project three dimensional data to two dimensions
getsin.c	Convert a user coordinate input string into pixel values
gettic.c	Determine start and end values of the tickmarks
labstr.c	Clean up a plot label
mima.c		Determine min and max in an array and write into descriptor
minmax.c	Determine minnimum and maximum in an array
plbdfi.c	Produce FULL information around a PLOT/COL or PLOT/ROW plot
plcon.c		Contour plotting routine for two dimensional data
pldesi.c	Produce FULL information around a PLOT/DESCRIPTOR plot
plerr.c		Overplot error bars from one or two columns of a TABLE 
plfrm3.c	Draws a perspective frame including tickmarks and labels
plgra.c         Grayscale plotting routine for two dimensional data
plgrd.c		Draws a grid over existing frame
plhsti.c	Plot full information around a histogram plot
pliden.c	Plot minimal information around a graph, outside the axis
plinfo.c	Plot general information around a graphic like logo, data, etc.
plkeyi.c	Produce FULL information around a PLOT/KEYWORD plot
pllogi.c	Plot MIDAS logo
plmodf.c	Modify data values in a FRAME using the cursor
plper.c		Perspective plotting routine for two dimensional data
pltbli.c	Produce plot information for a 2-D or 3-D TABLE plot
pltset.c	Determine character and symbol sizes for the MIDAS layout
plvec.c		Vector plotting routine for two dimensional data
setwnd.c	Set the plot window coordinates to world coordinates
skipnul.c	Skip NULL values in two planes extracted from a table
sorlev.c	Sort string of values into ascending sequence of values
tbl_usrinp.c	Split user input into column designation, row number and items
trncase.c	Convert the characters of a string to lower/upper case
usrinp.c	Decode a character string into an array of char, int, etc.
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