Linux Certif

Toute la documentation sur la certification Linux LPI

d.histogram.1grass

NAME

d.histogram - Displays a histogram in the form of a pie or bar chart for a user-specified raster map.

KEYWORDS

display

SYNOPSIS

d.histogram
d.histogram help
d.histogram [-nqC] map=name [style=string] [color=name] [bgcolor=name] [nsteps=integer] [--verbose] [--quiet]

Flags:

-n

Display information for null cells

-q

Gather the histogram quietly

-C

Report for ranges defined in cats file (fp maps only)

--verbose

Verbose module output

--quiet

Quiet module output

Parameters:

map=name

Raster map for which histogram will be displayed

style=string

Indicate if a pie or bar chart is desired
Options: pie,bar
Default: bar

color=name

Color for text and axes
Either a standard color name or R:G:B triplet
Default: black

bgcolor=name

Background color
Either a standard GRASS color, R:G:B triplet, or "none"
Default: white

nsteps=integer

Number of steps to divide the data range into (fp maps only)
Default: 255

DESCRIPTION

d.histogram displays the category-value distribution for a user-specified raster map layer, in the form of a bar chart or a pie chart. The display will be displayed in the active display frame on the graphics monitor, using the colors in the raster map layer's color table. The program determines the raster map's category value distribution by counting cells.

NOTES

d.histogram respects the current geographic region settings and the current MASK (if one exists).

d.histogram uses the colors in the map's color look-up table (i.e., the map's colr or colr2 file).

SEE ALSO

d.colors, d.colortable, d.frame, d.graph, d.linegraph, d.polar, g.region, r.stats

AUTHOR

Dave Johnson

 DBA Systems, Inc. 

 10560 Arrowhead Drive 

 Fairfax, Virginia 22030

Last changed: $Date: 2007-05-17 10:13:14 +0200 (gio, 17 mag 2007) $

Full index

© 2003-2010 GRASS Development Team