Continuous scale constructor.
continuous_scale(aesthetics, scale_name, palette, name = waiver(),
breaks = waiver(), minor_breaks = waiver(), labels = waiver(),
limits = NULL, rescaler = rescale, oob = censor,
expand = waiver(), na.value = NA_real_, trans = "identity",
guide = "legend", position = "left", super = ScaleContinuous)
The names of the aesthetics that this scale works with
The name of the scale
A palette function that when called with a numeric vector with values between 0 and 1 returns the corresponding values in the range the scale maps to.
The name of the scale. Used as the axis or legend title. If
waiver()
, the default, the name of the scale is taken from the first
mapping used for that aesthetic. If NULL
, the legend title will be
omitted.
One of:
NULL
for no breaks
waiver()
for the default breaks computed by the
transformation object
A numeric vector of positions
A function that takes the limits as input and returns breaks as output
One of:
NULL
for no minor breaks
waiver()
for the default breaks (one minor break between
each major break)
A numeric vector of positions
A function that given the limits returns a vector of minor breaks.
One of:
NULL
for no labels
waiver()
for the default labels computed by the
transformation object
A character vector giving labels (must be same length as breaks
)
A function that takes the breaks as input and returns labels as output
A numeric vector of length two providing limits of the scale.
Use NA
to refer to the existing minimum or maximum.
Used by diverging and n colour gradients
(i.e. scale_colour_gradient2()
, scale_colour_gradientn()
).
A function used to scale the input values to the range [0, 1].
Function that handles limits outside of the scale limits
(out of bounds). The default replaces out of bounds values with NA
.
Vector of range expansion constants used to add some
padding around the data, to ensure that they are placed some distance
away from the axes. Use the convenience function expand_scale()
to generate the values for the expand
argument. The defaults are to
expand the scale by 5% on each side for continuous variables, and by
0.6 units on each side for discrete variables.
Missing values will be replaced with this value.
Either the name of a transformation object, or the object itself. Built-in transformations include "asn", "atanh", "boxcox", "exp", "identity", "log", "log10", "log1p", "log2", "logit", "probability", "probit", "reciprocal", "reverse" and "sqrt".
A transformation object bundles together a transform, its inverse,
and methods for generating breaks and labels. Transformation objects
are defined in the scales package, and are called name_trans
, e.g.
scales::boxcox_trans()
. You can create your own
transformation with scales::trans_new()
.
A function used to create a guide or its name. See
guides()
for more info.
The position of the axis. "left" or "right" for vertical scales, "top" or "bottom" for horizontal scales
The super class to use for the constructed scale