|
|
| |
d.linegraph(1) |
GRASS GIS User's Manual |
d.linegraph(1) |
d.linegraph - Generates and displays simple line graphs in the
active graphics monitor display frame.
d.linegraph
d.linegraph --help
d.linegraph [-xysl] x_file=string
y_file=string[,string,...]
[directory=string]
[y_color=string[,string,...]]
[color_table=style]
[width=integer[,integer,...]]
[title_color=string] [x_title=string]
[y_title=string] [title=string]
[y_range=min,max]
[y_tics=float[,float,...]] [x_scale=float]
[y_scale=float] [icon=string]
[point_size=float] [secondary_color=name]
[secondary_width=float[,float,...]] [--help]
[--verbose] [--quiet] [--ui]
- -x
-
Scale only X labels, not values
- -y
-
Scale only Y labels, not values
- -s
-
Draw points
- -l
-
Do not draw lines
- --help
-
Print usage summary
- --verbose
-
Verbose module output
- --quiet
-
Quiet module output
- --ui
-
Force launching GUI dialog
- 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 files
Path to the directory where the input files are located
- y_color=string[,string,...]
-
Color for Y data
- color_table=style
-
Name of color table
Options: aspect, aspectcolr, bcyr, bgyr, blues, byg, byr, celsius,
corine, curvature, differences, elevation, etopo2, evi, fahrenheit,
forest_cover, gdd, grass, greens, grey, grey.eq, grey.log, grey1.0,
grey255, gyr, haxby, inferno, kelvin, magma, ndvi, ndwi, nlcd, oranges,
plasma, population, population_dens, precipitation, precipitation_daily,
precipitation_monthly, rainbow, ramp, random, reds, roygbiv, rstcurv, ryb,
ryg, sepia, slope, soilmoisture, srtm, srtm_plus, terrain, viridis, water,
wave
aspect: aspect oriented grey colors [range: map values]
aspectcolr: aspect oriented rainbow colors [range: 0 to 360]
bcyr: blue through cyan through yellow to red [range: map values]
bgyr: blue through green through yellow to red [range: map values]
blues: white to blue [range: map values]
byg: blue through yellow to green [range: map values]
byr: blue through yellow to red [range: map values]
celsius: blue to red for degree Celsius temperature [range: -80 to
80]
corine: EU Corine land cover colors [range: 111 to 995]
curvature: for terrain curvatures (from v.surf.rst and
r.slope.aspect) [range: map values]
differences: differences oriented colors [range: map values]
elevation: maps relative ranges of raster values to elevation color
ramp [range: map values]
etopo2: colors for ETOPO2 worldwide bathymetry/topography [range:
-11000 to 8850]
evi: enhanced vegetative index colors [range: -1 to 1]
fahrenheit: blue to red for Fahrenheit temperature [range: -112 to
176]
forest_cover: percentage of forest cover [range: 0 to 100]
gdd: accumulated growing degree days [range: 0 to 6000]
grass: GRASS GIS green (perceptually uniform) [range: map values]
greens: white to green [range: map values]
grey: grey scale [range: map values]
grey.eq: histogram-equalized grey scale [range: map values]
grey.log: histogram logarithmic transformed grey scale [range: map
values]
grey1.0: grey scale for raster values between 0.0-1.0 [range: 0 to
1]
grey255: grey scale for raster values between 0-255 [range: 0 to
255]
gyr: green through yellow to red [range: map values]
haxby: relative colors for bathymetry or topography [range: map
values]
inferno: perceptually uniform sequential color table inferno [range:
map values]
kelvin: blue to red for temperature in Kelvin scale [range: 193.15
to 353.15]
magma: perceptually uniform sequential color table magma [range: map
values]
ndvi: Normalized Difference Vegetation Index colors [range: -1 to 1]
ndwi: Normalized Difference Water Index colors [range: -200 to 200]
nlcd: US National Land Cover Dataset colors [range: 0 to 95]
oranges: white to orange [range: map values]
plasma: perceptually uniform sequential color table plasma [range:
map values]
population: color table covering human population classification
breaks [range: 0 to 2e+09]
population_dens: color table covering human population density
classification breaks [range: 0 to 1e+09]
precipitation: precipitation color table (0..2000mm) [range: 0 to
7000]
precipitation_daily: precipitation color table (0..1000mm) [range: 0
to 10000]
precipitation_monthly: precipitation color table (0..1000mm) [range:
0 to 1000]
rainbow: rainbow color table [range: map values]
ramp: color ramp [range: map values]
random: random color table [range: map values]
reds: white to red [range: map values]
roygbiv: [range: map values]
rstcurv: terrain curvature (from r.resamp.rst) [range: map values]
ryb: red through yellow to blue [range: map values]
ryg: red through yellow to green [range: map values]
sepia: yellowish-brown through to white [range: map values]
slope: r.slope.aspect-type slope colors for raster values 0-90
[range: 0 to 90]
soilmoisture: soilmoisture color table (0.0-1.0) [range: 0 to 1]
srtm: color palette for Shuttle Radar Topography Mission elevation
[range: -11000 to 8850]
srtm_plus: color palette for Shuttle Radar Topography Mission
elevation (with seafloor colors) [range: -11000 to 8850]
terrain: global elevation color table covering -11000 to +8850m
[range: -11000 to 8850]
viridis: perceptually uniform sequential color table viridis [range:
map values]
water: water depth [range: map values]
wave: color wave [range: map values]
- width=integer[,integer,...]
-
Width of the lines
- 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:
- y_range=min,max
-
Minimum and maximun value for Y axis (min,max)
- y_tics=float[,float,...]
-
Tic values for the Y axis
- x_scale=float
-
Scale for X values
- y_scale=float
-
Scale for Y values
- icon=string
-
Symbol for point
Options: basic/arrow, basic/arrow1, basic/arrow2, basic/arrow3,
basic/box, basic/circle, basic/cross1, basic/cross2, basic/cross3,
basic/diamond, basic/hexagon, basic/marker, basic/octagon, basic/pin,
basic/pin_dot, basic/point, basic/pushpin, basic/star, basic/triangle,
basic/x, demo/muchomurka, demo/smrk, extra/4pt_star, extra/adcp,
extra/airport, extra/alpha_flag, extra/bridge, extra/dim_arrow,
extra/dive_flag, extra/fiducial, extra/fish, extra/half-box,
extra/half-circle, extra/offbox_ne, extra/offbox_nw, extra/offbox_se,
extra/offbox_sw, extra/pentagon, extra/ping, extra/ring, extra/simple_zia,
extra/target, geology/circle_cross, geology/half-arrow_left,
geology/half-arrow_right, geology/strike_box, geology/strike_circle,
geology/strike_cleavage, geology/strike_half-bowtie, geology/strike_line,
geology/strike_parallel, geology/strike_triangle, legend/area,
legend/area_curved, legend/line, legend/line_crooked,
n_arrows/basic_compass, n_arrows/fancy_compass, n_arrows/n_arrow1a,
n_arrows/n_arrow1b, n_arrows/n_arrow2, n_arrows/n_arrow3,
n_arrows/n_arrow4, n_arrows/n_arrow5, n_arrows/n_arrow6,
n_arrows/n_arrow7a, n_arrows/n_arrow7b, n_arrows/n_arrow8a,
n_arrows/n_arrow8b, n_arrows/n_arrow9
Default: basic/circle
- point_size=float
-
Point size
Default: 5
- secondary_color=name
-
Color
Color for point symbol edge color
Default: black
- secondary_width=float[,float,...]
-
Width of point symbol lines
Default: 0.1
d.linegraph is a module to draw simple x,y line graphs (plots) based on
numerical data contained in separate files.
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.
If the directory option is provided, the paths to files can (and should)
be only relative paths to these files. While this is not recommended for
scripting, it can be advantageous when typing the paths manually. For example
when all files are stored in the directory /home/john/data, the user can
provide the following in the command line:
d.linegraph directory=/home/john/data x_file=x.txt y_file=y1.txt,y2.txt
The user can specify the y_color option, the color_table option or
just leave the defaults to influence the color of the plotted lines.
Colors specified by y_color option are 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. It can be one of GRASS GIS named colors or the RGB values from
0-255 separated by colons (RRR:GGG:BBB).
Alternatively, the user can use the color_table option to
specify one of the GRASS GIS predefined color tables.
By default, a series of colors will be chosen by the module if
none are provided upon invocation. The order of default colors is red,
green, violet, blue, orange, gray, brown, magenta, white, and indigo. The
user is advised not to rely on the order of default colors but to either use
the y_color or the color_table option to obtain predictable
and reproducible results.
The color to be used for titles, axis lines, tics, and scale
numbers is determined by the title_color option. The user can provide
one of the GRASS GIS named colors (such as gray, white, or black) or use the
GRASS GIS colon-separated format for RGB (RRR:GGG:BBB).
The title option specifies the text for the title of the graph. It will
be centered over the top of graph. The x_title option is a text to
describe data for X axis. It will be centered beneath the graph. Default is no
text unless there is a need for a unit descriptor determined by the
d.linegraph module, then string such as "in hundreds" is
generated. The y_title option is a text to describe data for Y axis. It
will be centered beneath the X data description. Similarly, to the
x_title option, default is no text unless there is a need for an
auto-generated description. In the case of graphs with multiple lines
(multiple inputs for Y axis), user may wish to use more specific text
placement using the d.text or v.label programs.
For historical reasons, the d.linegraph module accepts titles of more
than one word where the underscore character ("_") is used to
represent spaces (" "). For example "Census_data_1990"
would be printed over the graph as "Census data 1990". The use of
underscores is not necessary to use as long as the parameter is quoted in the
command line. In general, use of underscores is not recommended and there is
no need to use it at all in the GUI or when using d.linegraph in Python
scripts.
The way the program locates and labels tic marks is less than
perfect:
1) although distances between Y tics are 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).
Depending on the user’s needs, it might be easier or more
appropriate to use a 3rd party tool such as xgraph, gnuplot, Matplotlib in
Python, or R instead of d.linegraph. For a more general solution for
plotting in GRASS GIS, the user is advised to use the d.graph
module.
The following can be executed in Bash to create the input data for this example.
The user can just create these files in a text editor, save them and specify
path to them.
cat > x.txt <<EOF
1
3
4
6
9
EOF
cat > y1.txt <<EOF
50
58
65
34
27
EOF
cat > y2.txt <<EOF
10
20
35
50
45
EOF
The next command sequence creates a file plot.png in the current
directory which is the drawing made by d.linegraph.
d.mon start=cairo output=plot.png width=400 height=400
d.linegraph x_file=x.txt y_file=y1.txt,y2.txt
d.mon stop=cairo
d.frame, d.text, v.label, d.graph,
d.histogram
Chris Rewerts, Agricultural Engineering, Purdue University
Available at: d.linegraph source code (history)
Main index | Display index | Topics index | Keywords index |
Graphical index | Full index
© 2003-2021 GRASS Development Team, GRASS GIS 7.8.6
Reference Manual
Visit the GSP FreeBSD Man Page Interface. Output converted with ManDoc. |