wbt_local_quadratic_regression

An implementation of the constrained quadratic regression algorithm using a flexible window size described in Wood (1996).

GeomorphometricAnalysis

An R frontend for the 'WhiteboxTools' library, which is an advanced geospatial data analysis platform developed by Prof. John Lindsay at the University of Guelph's Geomorphometry and Hydrogeomatics Research Group. 'WhiteboxTools' can be used to perform common geographical information systems (GIS) analysis operations, such as cost-distance analysis, distance buffering, and raster reclassification. Remote sensing and image processing tasks include image enhancement (e.g. panchromatic sharpening, contrast adjustments), image mosaicing, numerous filtering operations, simple classification (k-means), and common image transformations. 'WhiteboxTools' also contains advanced tooling for spatial hydrological analysis (e.g. flow-accumulation, watershed delineation, stream network analysis, sink removal), terrain analysis (e.g. common terrain indices such as slope, curvatures, wetness index, hillshading; hypsometric analysis; multi-scale topographic position analysis), and LiDAR data processing. Suggested citation: Lindsay (2016) <doi:10.1016/j.cageo.2016.07.003>.

Andrew Brown

whitebox

'WhiteboxTools' R Frontend

Qiusheng Wu

wbt_local_quadratic_regression function

<dl><dt>dem</dt>
<dd>Name of the input DEM raster file.</dd>
<dt>output</dt>
<dd>Name of the output raster file.</dd>
<dt>filter</dt>
<dd>Edge length of the filter kernel.</dd>
<dt>wd</dt>
<dd>Changes the working directory.</dd>
<dt>verbose_mode</dt>
<dd>Sets verbose mode. If verbose mode is <code>FALSE</code>, tools will not print output messages.</dd>
<dt>compress_rasters</dt>
<dd>Sets the flag used by 'WhiteboxTools' to determine whether to use compression for output rasters.</dd>
<dt>command_only</dt>
<dd>Return command that would be executed by <code><a href="/link/system()?package=whitebox&version=2.3.1" data-mini-rdoc="whitebox::system()">system()</a></code> rather than running tool.</dd></dl>

Arguments

Local quadratic regression — wbt_local_quadratic_regression

<dl>

<dt>dem</dt>
<dd>Name of the input DEM raster file.</dd>


<dt>output</dt>
<dd>Name of the output raster file.</dd>


<dt>filter</dt>
<dd>Edge length of the filter kernel.</dd>


<dt>wd</dt>
<dd>Changes the working directory.</dd>


<dt>verbose_mode</dt>
<dd>Sets verbose mode. If verbose mode is <code>FALSE</code>, tools will not print output messages.</dd>


<dt>compress_rasters</dt>
<dd>Sets the flag used by 'WhiteboxTools' to determine whether to use compression for output rasters.</dd>


<dt>command_only</dt>
<dd>Return command that would be executed by <code><a href='https://rdrr.io/r/base/system.html'>system()</a></code> rather than running tool.</dd>

</dl>

wbt_local_quadratic_regression: Local quadratic regression

Description

Usage

Value

Arguments