make_polygons: Turns a set of points into hexagons In 56north/hexamapmaker: Turns Points into Hexagons

Description

make_polygons takes a set of points (x and y coordinates) and turns them into hexagons. The idea is, that you can quickly design the layout of a hexagon map by just adding points in a coordinate system. Then the hexamap function turns them into hexagon-shaped polygons that can be plotted with ggplot2.

Usage

 `1` ```make_polygons(z) ```

Arguments

 `z` A data frame containing x, y and id.

Value

The function returns a set of hexagons.

Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54``` ```# Load libraries library(hexamapmaker) library(ggplot2) library(tibble) library(ggthemes) # Points on a "normal" grid. my_points <- tibble::tibble( x = c(1, 2, 1, 2, 1, 2, 4, 4), y = c(1, 1, 2, 2, 3, 3, 1, 2), id = c("test1", "test2", "test3", "test4", "test5", "test6", "test7", "test8") ) # Plot the points ggplot(my_points, aes(x = x, y = y, group = id)) + geom_point() + coord_fixed(ratio = 1) + theme_map() # Turn points into hexagons hexa_points <- make_polygons(my_points) # Plot the new hexagons ggplot(hexa_points, aes(x, y, group = id)) + geom_polygon(colour = "black", fill = NA) + coord_fixed(ratio = 1) + theme_map() # Oh no! It is way off - lets fix it. my_points <- fix_shape(my_points) # Plot points ggplot(my_points, aes(x = x, y = y, group = id)) + geom_point() + coord_fixed(ratio = 1) + theme_map() # Turn points into hexagons hexa_points <- make_polygons(my_points) ggplot(hexa_points, aes(x, y, group = id)) + geom_polygon(colour = "black", fill = NA) + coord_fixed(ratio = 1) + theme_map() # Add color by using the fill argument in ggplot. # Remember to remove it from the geom_polygon then (p <- ggplot(hexa_points, aes(x, y, group = id, fill = id)) + geom_polygon(colour = "black", show.legend = FALSE) + coord_fixed(ratio = 1) + theme_map()) # Label hexagons add_hexalabel(hexa_points, p) ```

56north/hexamapmaker documentation built on May 5, 2019, 11:27 a.m.