R igraph manual pages

Diverging palette

Description

This is the ‘PuOr’ palette from http://colorbrewer2.org. It has at most eleven colors.

Usage

diverging_pal(n)

Arguments

n	The number of colors in the palette. The maximum is eleven currently.

Details

This is similar to sequential_pal, but it also puts emphasis on the mid-range values, plus the the two extreme ends. Use this palette, if you have such a quantity to mark with vertex colors.

Value

A character vector of RGB color codes.

See Also

Other palettes: categorical_pal, r_pal, sequential_pal

Examples

## Not run: 
library(igraphdata)
data(foodwebs)
fw <- foodwebs[[1]] %>%
  induced_subgraph(V(.)[ECO == 1]) %>%
  add_layout_(with_fr()) %>%
  set_vertex_attr("label", value = seq_len(gorder(.))) %>%
  set_vertex_attr("size", value = 10) %>%
  set_edge_attr("arrow.size", value = 0.3)

V(fw)$color <- scales::dscale(V(fw)$Biomass %>% cut(10), diverging_pal)
plot(fw)

data(karate)
karate <- karate %>%
  add_layout_(with_kk()) %>%
  set_vertex_attr("size", value = 10)

V(karate)$color <- scales::dscale(degree(karate) %>% cut(5), diverging_pal)
plot(karate)

## End(Not run)

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