Ubuntu Manpage: d.linegraph - Generates and displays simple line graphs in the active graphics monitor display frame.

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Provided by: grass-doc_7.0.3-1build1_all

NAME

       d.linegraph  - Generates and displays simple line graphs in the active graphics monitor display frame.

KEYWORDS

       display, cartography

SYNOPSIS

       d.linegraph
       d.linegraph --help
       d.linegraph  x_file=string y_file=string[,string,...]  [directory=string]   [y_color=string[,string,...]]
       [title_color=string]    [x_title=string]    [y_title=string]    [title=string]    [--help]    [--verbose]
       [--quiet]  [--ui]

   Flags:
       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       x_file=string [required]
           Name of data file for X axis of graph

       y_file=string[,string,...] [required]
           Name of data file(s) for Y axis of graph

       directory=string
           Path to file location

       y_color=string[,string,...]
           Color for Y data

       title_color=string
           Color for axis, tics, numbers, and title
           Default: black

       x_title=string
           Title for X data
           Default:

       y_title=string
           Title for Y data
           Default:

       title=string
           Title for Graph
           Default:

DESCRIPTION

d.linegraph is a primitive program to draw simple x,y line graphs based on numerical data contained in
separate files.

Data file format
The X and Y data files for the graph are essentially a column of numbers in each file, with one input
number per line. The program expects that each X value will have a corresponding Y value, therefore the
number of lines in each data input file should be the same. Essentially, the X data becomes the X axis
reference to which the Y data is plotted as a line. Therefore, the X data should be a monotonically
increasing progression of numbers (i.e. "1,2,3,..."; "0, 10, 100, 1000,..."; "...-5,-1,0,1,5..."). If
multiple Y data files are used, the Y axis scale will be based on the range of minimum and maximum values
from all Y files, then all Y data given will be graphed according to that Y scale. Therefore, if multiple
Y data inputs are used with dissimilar units, the graph produced comparing the two will be deceptive.

directoryname
Path to the directory where the input files are located.
Example format: /usr/grass/data/graph

ycoloroption[,option,...]]
Color to be used for drawing the lines in the graph. If multiple Y data files are used, an equal
number of colors may be used to control the colors of the lines. Colors will be assigned to Y data in
respect to the sequence of instantiation on the command line. Options are listed below. By
default, a series of colors will be chosen by the program if none are provided upon invocation.
Order of default colors: yellow, red, green, violet, blue, orange, gray, brown, magenta, white,
indigo).

titlecoloroption
The color to be used for titles, axis lines, tics, and scale numbers.
Default: "white"
Color options: red, orange, yellow, green, blue, indigo, violet, magenta, brown, gray, white, and
black.

xtitlevalue
Title to describe X data. Will be centered beneath the graph. Default is no title unless the need for
a unit descriptor is computed by the program (i.e. X: title in hundreds). Also, see NOTES section
(below) for a format caveat for multi-word titles.

ytitlevalue
Title to describe Y data. Will be centered beneath the X data title. Default is no title unless the
need for a unit descriptor is computed by the program (i.e. Y: ttiittllee in thousands). Also, see
NOTES section (below) for a format caveat for multi-word titles. In the case of graphs with multiple
lines, one may wish to use more specific title placement by using the d.text or v.label programs.

titlevalue
Title to describe the graph. Will be centered over the top of graph. Default is no title. See NOTES
section (below) for a format caveat for multi-word titles.

NOTES

       Since the command line parser is not amiable to multiple word inputs, to input titles of  more  than  one
       word, use the underscore character ("") to represent spaces (" ").

       Example: "titleCensusdata1990" would be printed over the graph as "Census data 1990".

       The  way  the  program locates and labels tic marks is less than perfect: 1) although distances between Y
       tics is proportional to the value, they are not proportional on the X axis; 2) decimal values between  -1
       and  1 can be printed on the X axis, but not on Y. (With respect to the later, the input for Y values can
       all be multiplied by a factor of 10 before graphing).

       It might be easier to use a 3rd party tool such as xgraph or GNUplot instead of d.linegraph.  .  (You can
       make  GNUplot  output pretty by using its SVG or PostScript output driver and converting that back into a
       rasterized image in a paint program)

AUTHOR

       Chris Rewerts, Agricultural Engineering, Purdue University

       Last changed: $Date: 2012-12-28 11:52:38 +0100 (Fri, 28 Dec 2012) $

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