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r.li.renyigrass - Online in the Cloud

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This is the command r.li.renyigrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


r.li.renyi - Calculates Renyi’s diversity index on a raster map

KEYWORDS


raster, landscape structure analysis, diversity index

SYNOPSIS


r.li.renyi
r.li.renyi --help
r.li.renyi input=name config=name alpha=string output=name [--overwrite] [--help]
[--verbose] [--quiet] [--ui]

Flags:
--overwrite
Allow output files to overwrite existing files

--help
Print usage summary

--verbose
Verbose module output

--quiet
Quiet module output

--ui
Force launching GUI dialog

Parameters:
input=name [required]
Name of input raster map

config=name [required]
Configuration file

alpha=string [required]
Alpha value is the order of the generalized entropy

output=name [required]
Name for output raster map

DESCRIPTION


r.li.renyi calculates the "Renyi’s diversity index" as:
with:

· H: Renyi entropy

· alpha: order of the generalized entropy

· i: patch type

· S: number of different patch types

· pi: proportional abundance of patch type i

NOTES


Do not use absolute path names for the config and output file/map parameters. If the
"moving window" method was selected in g.gui.rlisetup, then the output will be a raster
map, otherwise an ASCII file will be generated in the folder
C:\Users\userxy\AppData\Roaming\GRASS7\r.li\output\ (MS-Windows) or
$HOME/.grass7/r.li/output/ (GNU/Linux).

If the input raster map contains only NULL values then r.li.renyi returns NULL.

EXAMPLES


To calculate Renyi’s diversity index on map my_map, using my_conf configuration file
(previously defined with g.gui.rlisetup) and saving results in my_out, run:
r.li.renyi input=my_map conf=my_conf output=my_out alpha=0.6

Forest map (Spearfish sample dataset) example:
g.region raster=landcover.30m -p
r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
r.li.renyi input=forests conf=movwindow7 out=forests_renyi_mov7_a06 alpha=0.6
r.univar forests_renyi_mov7_a06

Forest map (North Carolina sample dataset) example:
g.region raster=landclass96 -p
r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
r.li.renyi input=forests conf=movwindow7 out=forests_renyi_mov7
# verify
r.univar forests_renyi_mov7
r.to.vect input=forests output=forests type=area
d.mon wx0
d.rast forests_renyi_mov7
d.vect forests type=boundary

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