LPFILE.TXT    Documentation for LinePlotFiles    2002/05/10

     LinePlotFiles are ASCII files containing tabular data of one or
more functions of a single X coordinate.  A LinePlotFile contains the
information necessary to produce two dimensional line graphs, including
title, labels for each of the coordinates, short tokens for each of the
lines, and several rows of numerical data.  The programs DATA, SUM and
IJTOJ read a DataFile and produce a LinePlotFile of selected
information.  The program MERGE will create an output LinePlotFile
(called MERGE.LP) each of whose lines are linear combinations of lines
of the input LinePlotFiles.  The program PCLPLOT will display the
contents of a single LinePlotFile of the PC graphic screen.


Organization of data in a LinePlotFile
--------------------------------------
Line 1: a title,
Line 2: label for X coordinate, such as "Years" or "Latitude",
Line 3: label for Y coordinate including the physical units of the Y
        values,
Line 4: a word that descibes the X coordinate and a short token for
        each of the Y lines,
Subsequent lines: a number for the X coordinate and separate numbers
                  for each of the Y lines.  An asterisk for a Y value
                  indicates missing data.