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Create a vector of colors for vertices and edges

Source: R/color_mixer.R
make_colors.Rd

Using vertex/edge attributes, these functions return vectors of colors that can be used either during the creation of the nplot object, or afterwards when changing gpar (graphical parameter) values with set_gpar.

Usage

make_colors(dat, categorical = FALSE, color_map = grDevices::hcl.colors)

make_edges_colors(x, eattr, ...)

make_vertex_colors(x, vattr, ...)

Arguments

dat

A vector of data to generate the color from.

categorical

Logical. When TRUE sets the colors as categories.

color_map

A function to generate a palette.

x

A graph of class network or igraph.

...

Further arguments passed to make_colors.

vattr, eattr

Character. Names of either vertex or edge variables to be used for generating the colors.

Value

A vector of colors with the attribute color_map. The color map used to generate the colors.

Details

If no attribute is provided, then by defaul the colors are set according to indegree.

x can be either a graph of class igraph or network.

Examples


data(UKfaculty, package="igraphdata")
col <- make_vertex_colors(UKfaculty, "Group")
#> This graph was created by an old(er) igraph version.
#> ℹ Call `igraph::upgrade_graph()` on it to use with the current igraph version.
#> For now we convert it on the fly...

if (require(magrittr)) {

  nplot(UKfaculty) %>%
    set_vertex_gpar("core", fill = col, col=col) %>%
    set_vertex_gpar("frame", fill = col, col=col, alpha=.7) %>%
    set_edge_gpar(col="gray50", fill="gray50", alpha=.5)
}
#> Loading required package: magrittr