d.vect.chart(1) - Linux man page

Name

d.vect.chart - Displays charts of GRASS vector data in the active frame on the graphics monitor

Keywords

display

Synopsis

d.vect.chart
d.vect.chart help
d.vect.chart [-cl] map=name [type=string[,string,...]] [layer=integer] [ctype=string] columns=string[,string,...] [sizecol=string] [size=integer] [scale=float] [ocolor=string] [colors=string[,string,...]] [max_ref=float[,float,...]] [--verbose] [--quiet]

Flags:

-c: Center the bar chart around a data point
-l: Create legend information and send to stdout
--verbose: Verbose module output
--quiet: Quiet module output

Parameters:

map=name: Name of input vector map
type=string[,string,...]: Type
Feature type(s)
Options: point,line,boundary,centroid,area
Default: point,line,boundary,centroid
layer=integer: Layer number
A single vector map can be connected to multiple database tables. This number determines which table to use.
Default: 1
ctype=string: Chart type
Options: pie,bar
Default: pie
columns=string[,string,...]: Attribute columns containing data
sizecol=string: Column used for pie chart size
size=integer: Size of chart (diameter for pie, total width for bar)
Default: 40
scale=float: Scale for size (to get size in pixels)
Default: 1
ocolor=string: Outline color
Default: black
colors=string[,string,...]: Colors used to fill charts
max_ref=float[,float,...]: Maximum value used for bar plot reference

Description

d.vect.chart displays charts for GRASS vector data in the active frame on the graphics monitor.

Notes

The charts are positioned as follows:

vector points: on point position

vector lines: on line centers

vector areas: on area centroids

Bar charts are placed with their lower edge starting from the y-coordinate of the feature being symbolized, and centered with respect to the x-coordinate. The -c flag can be used to center the bar chart in both x and y directions.
The 'sizecol' parameter is proportionate to the radius.
The optional max_ref parameter accepts a list of values that represent the maximum value for each column listed in the values for the parameter columns. These values are used to create a framed bar plot if ctype is bar (See Example 2).

Examples

Example 1

d.vect.chart map=vectmap columns=cens51,cens61,cens71,cens81

Example 2

Create framed bar graphs of an erodibiliy index from the SPEARFISH dataset.r.to.vect -s -v in=erode.index out=erode_index feature=area v.extract in=erode_index out=erode_index_ctrds type=centroid d.rast aspect d.vect.chart map=erode_index_ctrds ctype=bar columns=cat \ size=10 max_ref=12 scale=1.5 colors=yellow d.vect erode_index_ctrds icon=basic/circle fcol=black col=black size=5 Example screenshot (zoomed):

Author

Radim Blazek, ITC-Irst, Trento, Italy

Last changed: $Date: 2007-06-02 22:46:58 +0200 (Sat, 02 Jun 2007) $

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