GRASS GIS manual: d.histogram

Note: A new GRASS GIS stable version has been released: GRASS GIS 7.4, available here.
Updated manual page: here

NAME

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

KEYWORDS

display, histogram, statistics

SYNOPSIS

d.histogram

d.histogram --help

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

Flags:

-n: Display information for null cells
-c: Report for ranges defined in cats file (fp maps only)
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

map=name [required]: 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 color name, 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
NOTES
SEE ALSO
AUTHOR

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.