boB Rudis
8 years ago
6 changed files with 156 additions and 3 deletions
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#' Lollipop charts |
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#' |
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#' The lollipop geom is used to create lollipop charts. |
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#' |
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#' Lollipop charts are the creation of Andy Cotgreave going back to 2011. They |
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#' are a combination of a thin segment, starting at with a dot at the top and are a |
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#' suitable alternative to or replacement for bar charts. |
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#' |
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#' The \emph{bubblechart} is a scatterplot with a third variable mapped to |
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#' the size of points. There are no special names for scatterplots where |
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#' another variable is mapped to point shape or colour, however. |
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#' |
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#' @section Aesthetics: |
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#' \Sexpr[results=rd,stage=build]{ggplot2:::rd_aesthetics("geom", "point")} |
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#' @inheritParams ggplot2::layer |
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#' @param na.rm If \code{FALSE} (the default), removes missing values with |
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#' a warning. If \code{TRUE} silently removes missing values. |
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#' @param ... other arguments passed on to \code{\link{layer}}. These are |
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#' often aesthetics, used to set an aesthetic to a fixed value, like |
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#' \code{color = "red"} or \code{size = 3}. They may also be parameters |
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#' to the paired geom/stat. |
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#' @param point.size the size of the point |
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#' @param point.colour the colour of the point |
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#' @inheritParams ggplot2::layer |
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#' @export |
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geom_lollipop <- function(mapping = NULL, data = NULL, ..., |
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point.colour = NULL, point.size = NULL, |
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na.rm = FALSE, show.legend = NA, inherit.aes = TRUE) { |
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|
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layer( |
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data = data, |
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mapping = mapping, |
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stat = "identity", |
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geom = GeomLollipop, |
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position = "identity", |
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show.legend = show.legend, |
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inherit.aes = inherit.aes, |
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params = list( |
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na.rm = na.rm, |
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point.colour = point.colour, |
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point.size = point.size, |
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... |
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) |
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) |
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} |
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|
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#' @rdname ggalt-ggproto |
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#' @format NULL |
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#' @usage NULL |
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#' @export |
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GeomLollipop <- ggproto("GeomLollipop", Geom, |
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required_aes = c("x", "y"), |
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non_missing_aes = c("size", "shape", "point.colour", "point.size"), |
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default_aes = aes( |
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shape = 19, colour = "black", size = 0.5, fill = NA, |
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alpha = NA, stroke = 0.5 |
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), |
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|
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setup_data = function(data, params) { |
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transform(data, xend = x, yend = 0) |
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}, |
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|
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draw_group = function(data, panel_scales, coord, |
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point.colour = NULL, point.size = NULL) { |
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|
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points <- data |
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points$colour <- point.colour %||% data$colour |
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points$size <- point.size %||% (data$size * 2.5) |
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|
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gList( |
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ggplot2::GeomSegment$draw_panel(data, panel_scales, coord), |
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ggplot2::GeomPoint$draw_panel(points, panel_scales, coord) |
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) |
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|
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}, |
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|
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draw_key = draw_key_point |
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) |
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@ -0,0 +1,68 @@ |
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% Generated by roxygen2: do not edit by hand |
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% Please edit documentation in R/geom_lollipop.r |
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\name{geom_lollipop} |
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\alias{geom_lollipop} |
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\title{Lollipop charts} |
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\usage{ |
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geom_lollipop(mapping = NULL, data = NULL, ..., point.colour = NULL, |
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point.size = NULL, na.rm = FALSE, show.legend = NA, |
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inherit.aes = TRUE) |
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} |
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\arguments{ |
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\item{mapping}{Set of aesthetic mappings created by \code{\link{aes}} or |
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\code{\link{aes_}}. If specified and \code{inherit.aes = TRUE} (the |
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default), it is combined with the default mapping at the top level of the |
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plot. You must supply \code{mapping} if there is no plot mapping.} |
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|
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\item{data}{The data to be displayed in this layer. There are three |
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options: |
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|
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If \code{NULL}, the default, the data is inherited from the plot |
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data as specified in the call to \code{\link{ggplot}}. |
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|
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A \code{data.frame}, or other object, will override the plot |
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data. All objects will be fortified to produce a data frame. See |
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\code{\link{fortify}} for which variables will be created. |
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|
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A \code{function} will be called with a single argument, |
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the plot data. The return value must be a \code{data.frame.}, and |
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will be used as the layer data.} |
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|
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\item{...}{other arguments passed on to \code{\link{layer}}. These are |
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often aesthetics, used to set an aesthetic to a fixed value, like |
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\code{color = "red"} or \code{size = 3}. They may also be parameters |
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to the paired geom/stat.} |
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|
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\item{point.colour}{the colour of the point} |
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|
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\item{point.size}{the size of the point} |
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|
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\item{na.rm}{If \code{FALSE} (the default), removes missing values with |
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a warning. If \code{TRUE} silently removes missing values.} |
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|
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\item{show.legend}{logical. Should this layer be included in the legends? |
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\code{NA}, the default, includes if any aesthetics are mapped. |
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\code{FALSE} never includes, and \code{TRUE} always includes.} |
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|
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\item{inherit.aes}{If \code{FALSE}, overrides the default aesthetics, |
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rather than combining with them. This is most useful for helper functions |
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that define both data and aesthetics and shouldn't inherit behaviour from |
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the default plot specification, e.g. \code{\link{borders}}.} |
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} |
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\description{ |
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The lollipop geom is used to create lollipop charts. |
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} |
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\details{ |
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Lollipop charts are the creation of Andy Cotgreave going back to 2011. They |
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are a combination of a thin segment, starting at with a dot at the top and are a |
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suitable alternative to or replacement for bar charts. |
|||
|
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The \emph{bubblechart} is a scatterplot with a third variable mapped to |
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the size of points. There are no special names for scatterplots where |
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another variable is mapped to point shape or colour, however. |
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} |
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\section{Aesthetics}{ |
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|
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\Sexpr[results=rd,stage=build]{ggplot2:::rd_aesthetics("geom", "point")} |
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} |
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|
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