Usage
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")
Arguments
aesthetics
the names of the aesthetics that this scale works with
scale_name
the name of the scale
palette
a palette function that when called with a single integer
argument (the number of levels in the scale) returns the values that
they should take
name
The name of the scale. Used as axis or legend title. If
NULL, the default, the name of the scale is taken from the first
mapping used for that aesthetic.
breaks
One of: - NULLfor 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 
 minor_breaks
One of: - NULLfor 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 mino
 labels
One of: - NULLfor no labels
- waiver()for the default labels computed by the
    transformation object
- A character vector giving labels (must be same length asbreaks)
- A function that takes
 limits
A numeric vector of length two providing limits of the scale.
Use NA to refer to the existing minimum or maximum.
oob
Function that handles limits outside of the scale limits
(out of bounds). The default replaces out of bounds values with NA.
expand
A numeric vector of length two giving multiplicative and
additive expansion constants. These constants ensure that the data is
placed some distance away from the axes. The defaults are
c(0.05, 0) for continuous variables, and c(0, 0.6)<
na.value
Missing values will be replaced with this value.
trans
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". 
 guide
Name of guide object, or object itself.