This fits a quantile regression to the data and draws the fitted quantiles
with lines. This is as a continuous analogue to `geom_boxplot`

.

geom_quantile(mapping = NULL, data = NULL, stat = "quantile", position = "identity", ..., lineend = "butt", linejoin = "round", linemitre = 1, na.rm = FALSE, show.legend = NA, inherit.aes = TRUE) stat_quantile(mapping = NULL, data = NULL, geom = "quantile", position = "identity", ..., quantiles = c(0.25, 0.5, 0.75), formula = NULL, method = "rq", method.args = list(), na.rm = FALSE, show.legend = NA, inherit.aes = TRUE)

- mapping
Set of aesthetic mappings created by

`aes`

or`aes_`

. If specified and`inherit.aes = TRUE`

(the default), it is combined with the default mapping at the top level of the plot. You must supply`mapping`

if there is no plot mapping.- data
The data to be displayed in this layer. There are three options:

If

`NULL`

, the default, the data is inherited from the plot data as specified in the call to`ggplot`

.A

`data.frame`

, or other object, will override the plot data. All objects will be fortified to produce a data frame. See`fortify`

for which variables will be created.A

`function`

will be called with a single argument, the plot data. The return value must be a`data.frame.`

, and will be used as the layer data.- position
Position adjustment, either as a string, or the result of a call to a position adjustment function.

- ...
other arguments passed on to

`layer`

. These are often aesthetics, used to set an aesthetic to a fixed value, like`color = "red"`

or`size = 3`

. They may also be parameters to the paired geom/stat.- lineend
Line end style (round, butt, square)

- linejoin
Line join style (round, mitre, bevel)

- linemitre
Line mitre limit (number greater than 1)

- na.rm
If

`FALSE`

, the default, missing values are removed with a warning. If`TRUE`

, missing values are silently removed.- show.legend
logical. Should this layer be included in the legends?

`NA`

, the default, includes if any aesthetics are mapped.`FALSE`

never includes, and`TRUE`

always includes.- inherit.aes
If

`FALSE`

, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g.`borders`

.- geom, stat
Use to override the default connection between

`geom_quantile`

and`stat_quantile`

.- quantiles
conditional quantiles of y to calculate and display

- formula
formula relating y variables to x variables

- method
Quantile regression method to use. Currently only supports

`rq`

.- method.args
List of additional arguments passed on to the modelling function defined by

`method`

.

`geom_quantile`

understands the following aesthetics (required aesthetics are in bold):

**x****y**`alpha`

`colour`

`group`

`linetype`

`size`

`weight`

- quantile
quantile of distribution

#>#> #>#>#> #>#> #>#>#> #>#>#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'm + geom_quantile(quantiles = 0.5)#>#> Warning: partial match of 'coef' to 'coefficients'q10 <- seq(0.05, 0.95, by = 0.05) m + geom_quantile(quantiles = q10)#>#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'# You can also use rqss to fit smooth quantiles m + geom_quantile(method = "rqss")#>#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'factor' to 'factors'# Note that rqss doesn't pick a smoothing constant automatically, so # you'll need to tweak lambda yourself m + geom_quantile(method = "rqss", lambda = 0.1)#>#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'factor' to 'factors'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'factor' to 'factors'# Set aesthetics to fixed value m + geom_quantile(colour = "red", size = 2, alpha = 0.5)#>#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'#> Warning: partial match of 'coef' to 'coefficients'