Map continuous values to diverging colors (dark red -> white -> dark green)

values_to_colors_continuous(
  x,
  labels = NULL,
  min = -3,
  max = 3,
  neutral_min = -0.5,
  neutral_max = 0.5,
  low = "#7f0000",
  mid = "#ffffff",
  high = "#006400",
  n = 201
)

Arguments

x: Numeric vector. Can be named or unnamed, but must align with labels by name (preferred) or by position (same length).
labels: Character vector of node labels (names to use in the result).
min: Minimum value that maps to the darkest red (values below are clipped).
max: Maximum value that maps to the darkest green (values above are clipped).
low: Color for low end (default dark red).
mid: Color for midpoint (default white).
high: Color for high end (default dark green).
n: Number of discrete colors used internally for the gradient.

Value

Named character vector of hex colors with names equal to labels.

Examples

z_values <- c(-2.5, -1, 0, 1, 2.5)
names(z_values) <- paste0("Node", 1:5)
colors <- values_to_colors_continuous(z_values)
print(colors)
#>     Node1     Node2     Node3     Node4     Node5 
#> "#983232" "#E4CACA" "#ffffff" "#CADFCA" "#328232" 
t_values <- z_values * 10 + 50
names(t_values) <- paste0("Node", 1:5)
colors <- values_to_colors_continuous(t_values, min = 20, max = 80, neutral_min = 45, neutral_max = 55)
print(colors)
#>     Node1     Node2     Node3     Node4     Node5 
#> "#983232" "#E4CACA" "#ffffff" "#CADFCA" "#328232"