# R/geom_flat_violin.R In iholzleitner/frlgmm3D: FRL convenience functions around GMM

```#'geom_flat_violin_HELPER1
#'
#'Borrowed from
#'\href{https://gist.githubusercontent.com/benmarwick/2a1bb0133ff568cbe28d/raw/fb53bd97121f7f9ce947837ef1a4c65a73bffb3f/geom_flat_violin.R}{Ben Marwick}.
#'
#'@format NULL
#'@usage NULL
#'@name gfv_helper1
#'@import ggplot2

"%||%" <- function(a, b) {
if (!is.null(a)) a else b
}

#'geom_flat_violin_HELPER2
#'
#'Borrowed from
#'\href{https://gist.githubusercontent.com/benmarwick/2a1bb0133ff568cbe28d/raw/fb53bd97121f7f9ce947837ef1a4c65a73bffb3f/geom_flat_violin.R}{Ben Marwick}.
#'
#'@format NULL
#'@usage NULL

GeomFlatViolin <- ggplot2::ggproto(
"GeomFlatViolin",
ggplot2::Geom,
setup_data = function(data, params) {
data\$width <- data\$width %||%
params\$width %||% (resolution(data\$x, FALSE) * 0.9)

# ymin, ymax, xmin, and xmax define the bounding rectangle for each group
data %>%
dplyr::group_by(group) %>%
dplyr::mutate(
ymin = min(y),
ymax = max(y),
xmin = x,
xmax = x + width / 2
)

},

draw_group = function(data, panel_scales, coord) {
# Find the points for the line to go all the way around
data <- transform(data,
xminv = x,
xmaxv = x + violinwidth * (xmax - x))

# Make sure it's sorted properly to draw the outline
newdata <-
rbind(plyr::arrange(transform(data, x = xminv), y),
plyr::arrange(transform(data, x = xmaxv),-y))

# Close the polygon: set first and last point the same
# Needed for coord_polar and such
newdata <- rbind(newdata, newdata[1, ])

ggplot2:::ggname("geom_flat_violin",
ggplot2::GeomPolygon\$draw_panel(newdata, panel_scales, coord))
},

draw_key = ggplot2::draw_key_polygon,

default_aes = ggplot2::aes(
weight = 1,
colour = "grey20",
fill = "white",
size = 0.5,
alpha = NA,
linetype = "solid"
),

required_aes = c("x", "y")
)

#'geom_flat_violin
#'
#'Borrowed from
#'\href{https://gist.githubusercontent.com/benmarwick/2a1bb0133ff568cbe28d/raw/fb53bd97121f7f9ce947837ef1a4c65a73bffb3f/geom_flat_violin.R}{Ben Marwick}.
#'
#'@param mapping A value
#'@param data A value
#'@param position A value
#'@param show.legend A value
#'@param inherit.aes A value
#'@param stat A value
#'@param trim A value
#'@param scale A value
#'@param ... A value
#'
#'@examples
#'
#'ggplot2::ggplot(ggplot2::diamonds, ggplot2::aes(cut, carat)) +
#'  ggplot2::coord_flip() +
#'  geom_flat_violin()
#'
#'@export

geom_flat_violin <-
function(mapping = NULL,
data = NULL,
stat = "ydensity",
position = "dodge",
trim = TRUE,
scale = "area",
show.legend = NA,
inherit.aes = TRUE,
...) {
ggplot2::layer(
data = data,
mapping = mapping,
stat = stat,
geom = GeomFlatViolin,
position = position,
show.legend = show.legend,
inherit.aes = inherit.aes,
params = list(trim = trim,
scale = scale,
...)
)
}
```
iholzleitner/frlgmm3D documentation built on May 21, 2019, 1:44 p.m.