hexagon_default_params: [!] Calculate parameters for (regular) hexagon

In GegznaV/kohonen.hexagons: Hexagon plots for Kohonen self organizing maps (SOM)

Description

Function calculates parameters l and r for hexagon.

Usage

hexagon_default_params(r = NULL, l = NULL, x = NULL, y = NULL)

Arguments

r	radius of circle inscribed in hexagon. Default value is 0.5.
l	distance from the center to the upper/lower vertices of hexagon.
x, y	numeric vectors with hexagon center coordinates in hexagon grid.

Details

Function assumes regular pointy topped hexagon. (More on geometry of hexagons can be found here). Relation between parameters l and r in this kind of hexagon:
l = r / cos(pi/6)
r = l * cos(pi/6)

These proportions can be distorted to mach grid of x and y values so that hexahons vere plotted without gaps.

Value

List with calculated values of parameters r and l.

Author(s)

Vilmantas Gegzna

Examples

hexagon_default_params()

hexagon_default_params(r = 1)

hexagon_default_params(l = 1)

data <- class::somgrid(8,6,"hexagonal")$pts
hexagon_default_params(x = data[,"x"], y = data[,"y"])

hexagon_default_params(x = data[,"x"], y = data[,"y"]*2)

hexagon_default_params(x = data[,"x"]*2, y = data[,"y"])

GegznaV/kohonen.hexagons documentation built on May 6, 2019, 5:36 p.m.