Add Summary Statistics or a Geom onto a ggplot

Add summary statistics or a geometry onto a ggplot.

ggadd(
  p,
  add = NULL,
  color = "black",
  fill = "white",
  group = 1,
  width = 1,
  shape = 19,
  size = NULL,
  alpha = 1,
  jitter = 0.2,
  seed = 123,
  binwidth = NULL,
  dotsize = size,
  linetype = 1,
  show.legend = NA,
  error.plot = "pointrange",
  ci = 0.95,
  data = NULL,
  position = position_dodge(0.8),
  p_geom = ""
)

Arguments

p: a ggplot
add: character vector specifying other plot elements to be added. Allowed values are one or the combination of: "none", "dotplot", "jitter", "boxplot", "point", "mean", "mean_se", "mean_sd", "mean_ci", "mean_range", "median", "median_iqr", "median_hilow", "median_q1q3", "median_mad", "median_range".
color: point or outline color.
fill: fill color. Used only when error.plot = "crossbar".
group: grouping variable. Allowed values are 1 (for one group) or a character vector specifying the name of the grouping variable. Used only for adding statistical summary per group.
width: numeric value between 0 and 1 specifying bar or box width. Example width = 0.8. Used only when error.plot is one of c("crossbar", "errorbar").
shape: point shape. Allowed values can be displayed using the function show_point_shapes().
size: numeric value in [0-1] specifying point and line size.
alpha: numeric value specifying fill color transparency. Value should be in [0, 1], where 0 is full transparency and 1 is no transparency.
jitter: a numeric value specifying the amount of jittering. Used only when add contains "jitter".
seed: A random seed to make the jitter reproducible. Default is `123`. Useful if you need to apply the same jitter twice, e.g., for a point and a corresponding label. The random seed is reset after jittering. If `NA`, the seed is initialized with a random value; this makes sure that two subsequent calls start with a different seed. Use NULL to use the current random seed and also avoid resetting (the behaviour of ggplot 2.2.1 and earlier).
binwidth: numeric value specifying bin width. use value between 0 and 1 when you have a strong dense dotplot. For example binwidth = 0.2. Used only when add contains "dotplot".
dotsize: as size but applied only to dotplot.
linetype: line type.
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. It can also be a named logical vector to finely select the aesthetics to display.
error.plot: plot type used to visualize error. Allowed values are one of c("pointrange", "linerange", "crossbar", "errorbar", "upper_errorbar", "lower_errorbar", "upper_pointrange", "lower_pointrange", "upper_linerange", "lower_linerange"). Default value is "pointrange".
ci: the percent range of the confidence interval (default is 0.95).
data: a data.frame to be displayed. If NULL, the default, the data is inherited from the plot data as specified in the call to ggplot.
position: position adjustment, either as a string, or the result of a call to a position adjustment function. Used to adjust position for multiple groups.
p_geom: the geometry of the main plot. Ex: p_geom = "geom_line". If NULL, the geometry is extracted from p. Used only by ggline().

Examples

# Basic violin plot
data("ToothGrowth")
p <- ggviolin(ToothGrowth, x = "dose", y = "len", add = "none")

# Add mean +/- SD and jitter points
p %>% ggadd(c("mean_sd", "jitter"), color = "dose")


# Add box plot
p %>% ggadd(c("boxplot", "jitter"), color = "dose")