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 [-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: 2011-11-08 12:29:50 +0100 (Tue, 08 Nov 2011) $ Full index © 2003-2014 GRASS Development Team