Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

50 lines (42 sloc) 1.539 kB
#' Jitter points to avoid overplotting.
#'
#' @family position adjustments
#' @param width degree of jitter in x direction. Defaults to 40\% of the
#' resolution of the data.
#' @param height degree of jitter in y direction. Defaults to 40\% of the
#' resolution of the data
#' @export
#' @examples
#' qplot(am, vs, data=mtcars)
#'
#' # Default amount of jittering will generally be too much for
#' # small datasets:
#' qplot(am, vs, data=mtcars, position="jitter")
#' # Control the amount as follows
#' qplot(am, vs, data=mtcars, position=position_jitter(w=0.1, h=0.1))
#'
#' # The default works better for large datasets, where it will
#' # take up as much space as a boxplot or a bar
#' qplot(cut, price, data=diamonds, geom=c("boxplot", "jitter"))
position_jitter <- function (width = NULL, height = NULL) {
PositionJitter$new(width = width, height = height)
}
PositionJitter <- proto(Position, {
objname <- "jitter"
adjust <- function(., data) {
if (empty(data)) return(data.frame())
check_required_aesthetics(c("x", "y"), names(data), "position_jitter")
if (is.null(.$width)) .$width <- resolution(data$x) * 0.4
if (is.null(.$height)) .$height <- resolution(data$y) * 0.4
trans_x <- NULL
trans_y <- NULL
if(.$width > 0) {
trans_x <- function(x) jitter(x, amount = .$width)
}
if(.$height > 0) {
trans_y <- function(x) jitter(x, amount = .$height)
}
transform_position(data, trans_x, trans_y)
}
icon <- function(.) GeomJitter$icon()
})
Jump to Line
Something went wrong with that request. Please try again.