meanderingTriangles

Meandering triangles for hexagonal grid in C++

Kernel density estimation with hexagonal grid for bivariate data.
Hexagonal grid has many beneficial properties like equidistant neighbours
and less edge bias, making it better for spatial analyses than the more
commonly used rectangular grid.
Carr, D. B. et al. (1987) <doi:10.2307/2289444>.
Diggle, P. J. (2010) <doi:10.1201/9781420072884>.
Hill, B. (2017) <https://blog.bruce-hill.com/meandering-triangles>.
Jones, M. C. (1993) <doi:10.1007/BF00147776>.

Quoc Hoang Nguyen

hexDensity

Fast Kernel Density Estimation with Hexagonal Grid

Yunshun Chen

Dan Carr

Martin Maechler

meanderingTriangles function

<dl><dt>x.coords.left</dt>
<dd>Vector for x coords of left-aligned rows (row 1,3,5,...)</dd>
<dt>x.coords.right</dt>
<dd>Vector for x coords of right-aligned rows (row 2,4,6,...)</dd>
<dt>y.coords</dt>
<dd>Vector for y coords of all rows.</dd>
<dt>z</dt>
<dd>Matrix for elevation values for the grid point</dd>
<dt>levels</dt>
<dd>Vector of z value cutoffs for contouring.</dd></dl>

Arguments

Meandering triangles for hexagonal grid in C++ — meanderingTriangles

<dl>

<dt>x.coords.left</dt>
<dd>Vector for x coords of left-aligned rows (row 1,3,5,...)</dd>


<dt>x.coords.right</dt>
<dd>Vector for x coords of right-aligned rows (row 2,4,6,...)</dd>


<dt>y.coords</dt>
<dd>Vector for y coords of all rows.</dd>


<dt>z</dt>
<dd>Matrix for elevation values for the grid point</dd>


<dt>levels</dt>
<dd>Vector of z value cutoffs for contouring.</dd>

</dl>

meanderingTriangles: Meandering triangles for hexagonal grid in C++

Description

Usage

Value

Arguments

Details

References