ramp_colours {ggdist} | R Documentation |
Apply partial colour ramps
Description
Given vectors of colours and partial_colour_ramp
s, ramps the colours
according to the parameters of the partial colour ramps, returning
a vector of the same length as the inputs giving the transformed
(ramped) colours.
Usage
ramp_colours(colour, ramp)
Arguments
colour |
character vector of colours. |
ramp |
a |
Details
Takes vectors of colours and partial_colour_ramp
s and produces
colours by interpolating between each from
colour and the target colour
the specified amount
(where amount
and from
are the corresponding
fields of the ramp
).
For example, to add support for the fill_ramp
aesthetic to a geometry,
this line could be used inside the draw_group()
or draw_panel()
method
of a geom:
data$fill = ramp_colours(data$fill, data$fill_ramp)
Value
A character vector of colours.
Author(s)
Matthew Kay
See Also
Other colour ramp functions:
guide_rampbar()
,
partial_colour_ramp()
,
scale_colour_ramp
Examples
pcr = partial_colour_ramp(c(0, 0.25, 0.75, 1), "red")
pcr
ramp_colours("blue", pcr)