NAME
d.histogram - Displays a histogram in the form of a pie or bar chart for a user-specified raster file.
KEYWORDS
display
SYNOPSIS
d.histogram
d.histogram help
d.histogram [-nqC] map=string [color=string] [style=string] [nsteps=integer]
Flags:
- -n
- Display information for null cells
- -q
- Gather the histogram quietly
- -C
- Report for ranges defined in cats file (fp maps only)
Parameters:
- map=string
- Raster map for which histogram will be displayed
- color=string
- Color for legend and title
- Options: red,orange,yellow,green,blue,indigo,violet,white,black,gray,brown,magenta,aqua,grey,cyan,purple
- Default: black
- style=string
- Indicate if a pie or bar chart is desired
- Default: bar
- 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 file's category value distribution by counting
cells.
NOTES
d.histogram
uses 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).
d.histogram
does not erase the active frame before displaying output.
SEE ALSO
d.colors,
d.colortable,
d.erase,
d.polar,
g.region,
r.stats,
parser,
AUTHOR
Dave Johnson
DBA Systems, Inc.
10560 Arrowhead Drive
Fairfax, Virginia 22030
Last changed: $Date: 2006/04/13 18:50:10 $
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