hotspot_grid

Create either a rectangular or hexagonal two-dimensional grid

Identify and understand clusters of points (typically representing
the locations of places or events) stored in simple-features (SF) objects.
This is useful for analysing, for example, hot-spots of crime events. The
package emphasises producing results from point SF data in a single step
using reasonable default values for all other arguments, to aid rapid data
analysis by users who are starting out. Functions available include kernel
density estimation (for details, see Yip (2020)
<doi:10.22224/gistbok/2020.1.12>), analysis of spatial association (Getis
and Ord (1992) <doi:10.1111/j.1538-4632.1992.tb00261.x>) and hot-spot
classification (Chainey (2020) ISBN:158948584X).

Matt Ashby

sfhotspot

Hot-Spot Analysis with Simple Features

hotspot_grid function

<dl><dt>data</dt>
<dd><code><a href="https://r-spatial.github.io/sf/reference/sf.html">sf</a></code> data frame.</dd>
<dt>cell_size</dt>
<dd><code>numeric</code> value specifying the size of each equally
spaced grid cell, using the same units (metres, degrees, etc.) as used in
the <code>sf</code> data frame given in the <code>data</code> argument. If this
argument is <code>NULL</code> (the default), the cell size will be calculated
automatically (see Details).</dd>
<dt>grid_type</dt>
<dd><code>character</code> specifying whether the grid should be made
up of squares (<code>"rect"</code>, the default) or hexagons (<code>"hex"</code>).</dd>
<dt>quiet</dt>
<dd>if set to <code>TRUE</code>, messages reporting the values of any
parameters set automatically will be suppressed. The default is
<code>FALSE</code>.</dd>
<dt>...</dt>
<dd>Further arguments passed to <code>link[sf]{st_make_grid}</code>.</dd></dl>

Arguments

Create either a rectangular or hexagonal two-dimensional grid — hotspot_grid

<dl>

<dt>data</dt>
<dd><code><a href='https://r-spatial.github.io/sf/reference/sf.html'>sf</a></code> data frame.</dd>


<dt>cell_size</dt>
<dd><code>numeric</code> value specifying the size of each equally
spaced grid cell, using the same units (metres, degrees, etc.) as used in
the <code>sf</code> data frame given in the <code>data</code> argument. If this
argument is <code>NULL</code> (the default), the cell size will be calculated
automatically (see Details).</dd>


<dt>grid_type</dt>
<dd><code>character</code> specifying whether the grid should be made
up of squares (<code>"rect"</code>, the default) or hexagons (<code>"hex"</code>).</dd>


<dt>quiet</dt>
<dd>if set to <code>TRUE</code>, messages reporting the values of any
parameters set automatically will be suppressed. The default is
<code>FALSE</code>.</dd>


<dt>...</dt>
<dd>Further arguments passed to <code>link[sf]{st_make_grid}</code>.</dd>

</dl>

hotspot_grid: Create either a rectangular or hexagonal two-dimensional grid

Description

Usage

Value

Arguments