Qualitative colour scale with evenly spaced hues.

Usage

scale_colour_hue(
  ...,
  h = c(0, 360) + 15,
  c = 100,
  l = 65,
  h.start = 0,
  direction = 1,
  na.value = "grey50"
)

scale_fill_hue(
  ...,
  h = c(0, 360) + 15,
  c = 100,
  l = 65,
  h.start = 0,
  direction = 1,
  na.value = "grey50"
)

Arguments

...: Other arguments passed on to discrete_scale to control name, limits, breaks, labels and so forth.
h: range of hues to use, in [0, 360]
c: chroma (intensity of colour), maximum value varies depending on combination of hue and luminance.
l: luminance (lightness), in [0, 100]
h.start: hue to start at
direction: direction to travel around the colour wheel, 1 = clockwise, -1 = counter-clockwise
na.value: Colour to use for missing values

Examples

# \donttest{
dsamp <- diamonds[sample(nrow(diamonds), 1000), ]
(d <- ggplot(dsamp, aes(carat, price)) + geom_point(aes(colour = clarity)))


# Change scale label
d + scale_colour_hue()

d + scale_colour_hue("clarity")

d + scale_colour_hue(expression(clarity[beta]))


# Adjust luminosity and chroma
d + scale_colour_hue(l = 40, c = 30)

d + scale_colour_hue(l = 70, c = 30)

d + scale_colour_hue(l = 70, c = 150)

d + scale_colour_hue(l = 80, c = 150)


# Change range of hues used
d + scale_colour_hue(h = c(0, 90))

d + scale_colour_hue(h = c(90, 180))

d + scale_colour_hue(h = c(180, 270))

d + scale_colour_hue(h = c(270, 360))


# Vary opacity
# (only works with pdf, quartz and cairo devices)
d <- ggplot(dsamp, aes(carat, price, colour = clarity))
d + geom_point(alpha = 0.9)

d + geom_point(alpha = 0.5)

d + geom_point(alpha = 0.2)


# Colour of missing values is controlled with na.value:
miss <- factor(sample(c(NA, 1:5), nrow(mtcars), replace = TRUE))
ggplot(mtcars, aes(mpg, wt)) + geom_point(aes(colour = miss))

ggplot(mtcars, aes(mpg, wt)) +
  geom_point(aes(colour = miss)) +
  scale_colour_hue(na.value = "black")

# }

Qualitative colour scale with evenly spaced hues.

Usage

Arguments

See also

Examples