scale_colour_viridis_d | R Documentation |
The viridis
scales provide colour maps that are perceptually uniform in both
colour and black-and-white. They are also designed to be perceived by viewers
with common forms of colour blindness. See also
https://bids.github.io/colormap/.
scale_colour_viridis_d(
name = waiver(),
...,
alpha = 1,
begin = 0,
end = 1,
direction = 1,
option = "D",
aesthetics = "colour"
)
scale_fill_viridis_d(
name = waiver(),
...,
alpha = 1,
begin = 0,
end = 1,
direction = 1,
option = "D",
aesthetics = "fill"
)
scale_colour_viridis_c(
name = waiver(),
...,
alpha = 1,
begin = 0,
end = 1,
direction = 1,
option = "D",
values = NULL,
space = "Lab",
na.value = "grey50",
guide = "colourbar",
aesthetics = "colour"
)
scale_fill_viridis_c(
name = waiver(),
...,
alpha = 1,
begin = 0,
end = 1,
direction = 1,
option = "D",
values = NULL,
space = "Lab",
na.value = "grey50",
guide = "colourbar",
aesthetics = "fill"
)
scale_colour_viridis_b(
name = waiver(),
...,
alpha = 1,
begin = 0,
end = 1,
direction = 1,
option = "D",
values = NULL,
space = "Lab",
na.value = "grey50",
guide = "coloursteps",
aesthetics = "colour"
)
scale_fill_viridis_b(
name = waiver(),
...,
alpha = 1,
begin = 0,
end = 1,
direction = 1,
option = "D",
values = NULL,
space = "Lab",
na.value = "grey50",
guide = "coloursteps",
aesthetics = "fill"
)
name |
The name of the scale. Used as the axis or legend title. If
|
... |
Other arguments passed on to |
alpha |
The alpha transparency, a number in [0,1], see argument alpha in
|
begin , end |
The (corrected) hue in |
direction |
Sets the order of colors in the scale. If 1, the default, colors are ordered from darkest to lightest. If -1, the order of colors is reversed. |
option |
A character string indicating the color map option to use. Eight options are available:
|
aesthetics |
Character string or vector of character strings listing the
name(s) of the aesthetic(s) that this scale works with. This can be useful, for
example, to apply colour settings to the |
values |
if colours should not be evenly positioned along the gradient
this vector gives the position (between 0 and 1) for each colour in the
|
space |
colour space in which to calculate gradient. Must be "Lab" - other values are deprecated. |
na.value |
Missing values will be replaced with this value. |
guide |
A function used to create a guide or its name. See
|
The documentation on colour aesthetics.
Other colour scales:
scale_alpha()
,
scale_colour_brewer()
,
scale_colour_continuous()
,
scale_colour_gradient()
,
scale_colour_grey()
,
scale_colour_hue()
,
scale_colour_identity()
,
scale_colour_manual()
,
scale_colour_steps()
# viridis is the default colour/fill scale for ordered factors
set.seed(596)
dsamp <- diamonds[sample(nrow(diamonds), 1000), ]
ggplot(dsamp, aes(carat, price)) +
geom_point(aes(colour = clarity))
# Use viridis_d with discrete data
txsamp <- subset(txhousing, city %in%
c("Houston", "Fort Worth", "San Antonio", "Dallas", "Austin"))
(d <- ggplot(data = txsamp, aes(x = sales, y = median)) +
geom_point(aes(colour = city)))
d + scale_colour_viridis_d()
# Change scale label
d + scale_colour_viridis_d("City\nCenter")
# Select palette to use, see ?scales::pal_viridis for more details
d + scale_colour_viridis_d(option = "plasma")
d + scale_colour_viridis_d(option = "inferno")
# scale_fill_viridis_d works just the same as
# scale_colour_viridis_d but for fill colours
p <- ggplot(txsamp, aes(x = median, fill = city)) +
geom_histogram(position = "dodge", binwidth = 15000)
p + scale_fill_viridis_d()
# the order of colour can be reversed
p + scale_fill_viridis_d(direction = -1)
# Use viridis_c with continuous data
(v <- ggplot(faithfuld) +
geom_tile(aes(waiting, eruptions, fill = density)))
v + scale_fill_viridis_c()
v + scale_fill_viridis_c(option = "plasma")
# Use viridis_b to bin continuous data before mapping
v + scale_fill_viridis_b()
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