focalMat

Make a focal ("moving window") weight matrix for use in the <code>focal</code> function. The sum of the values adds up to one.

spatial

Methods for spatial data analysis with vector (points, lines, polygons) and raster (grid) data. Methods for vector data include geometric operations such as intersect and buffer. Raster methods include local, focal, global, zonal and geometric operations. The predict and interpolate methods facilitate the use of regression type (interpolation, machine learning) models for spatial prediction, including with satellite remote sensing data. Processing of very large files is supported. See the manual and tutorials on <https://rspatial.org/> to get started. 'terra' replaces the 'raster' package ('terra' can do more, and it is faster and easier to use).

Robert Hijmans

terra

Spatial Data Analysis

Robert J. Hijmans

Roger Bivand

Edzer Pebesma

Michael D. Sumner

focalMat function

<dl><dt>x</dt>
<dd>SpatRaster</dd><dt>d</dt>
<dd>numeric. If <code>type=circle</code>, the radius of the circle (in units of the crs). If <code>type=rectangle</code> the dimension of the rectangle (one or two numbers). If <code>type=Gauss</code> the size of sigma, and optionally another number to determine the size of the matrix returned (default is 3*sigma)</dd>
 
<dt>type</dt>
<dd>character indicating the type of filter to be returned</dd><dt>fillNA</dt>
<dd>logical. If <code>TRUE</code>, zeros are set to <code>NA</code> such that they are ignored in the computations. Only applies to <code>type="circle"</code></dd></dl>

Arguments

Focal weights matrix — focalMat

<dl>

<dt>x</dt>
<dd>SpatRaster</dd>

<dt>d</dt>
<dd>numeric. If <code>type=circle</code>, the radius of the circle (in units of the crs). If <code>type=rectangle</code> the dimension of the rectangle (one or two numbers). If <code>type=Gauss</code> the size of sigma, and optionally another number to determine the size of the matrix returned (default is 3*sigma)</dd>
 
<dt>type</dt>
<dd>character indicating the type of filter to be returned</dd>

<dt>fillNA</dt>
<dd>logical. If <code>TRUE</code>, zeros are set to <code>NA</code> such that they are ignored in the computations. Only applies to <code>type="circle"</code></dd>

</dl>

focalMat: Focal weights matrix

Description

Usage

Value

Arguments

Examples