Type: Package
Title: Improved Text Rendering Support for 'ggplot2'
Version: 0.1.2
Description: A 'ggplot2' extension that enables the rendering of complex formatted plot labels (titles, subtitles, facet labels, axis labels, etc.). Text boxes with automatic word wrap are also supported.
URL: https://wilkelab.org/ggtext/
BugReports: https://github.com/wilkelab/ggtext/issues
License: GPL-2
Depends: R (≥ 3.5)
Imports: ggplot2 (≥ 3.3.0), grid, gridtext, rlang, scales
Suggests: cowplot, dplyr, glue, knitr, rmarkdown, testthat, vdiffr
Encoding: UTF-8
RoxygenNote: 7.1.1
VignetteBuilder: knitr
NeedsCompilation: no
Packaged: 2022-09-15 13:50:50 UTC; brentonw
Author: Claus O. Wilke ORCID iD [aut], Brenton M. Wiernik ORCID iD [aut, cre] (Twitter: @bmwiernik)
Maintainer: Brenton M. Wiernik <brenton@wiernik.org>
Repository: CRAN
Date/Publication: 2022-09-16 11:36:07 UTC

Theme element that enables markdown text.

Description

Theme element that enables markdown text.

Usage

element_markdown(
  family = NULL,
  face = NULL,
  size = NULL,
  colour = NULL,
  fill = NULL,
  box.colour = NULL,
  linetype = NULL,
  linewidth = NULL,
  hjust = NULL,
  vjust = NULL,
  halign = NULL,
  valign = NULL,
  angle = NULL,
  lineheight = NULL,
  margin = NULL,
  padding = NULL,
  r = NULL,
  color = NULL,
  box.color = NULL,
  align_widths = NULL,
  align_heights = NULL,
  rotate_margins = NULL,
  debug = FALSE,
  inherit.blank = FALSE
)

Arguments

family

Font family

face

Font face

size

Font size

colour, color

Text color

fill

Fill color of the enclosing box

box.colour, box.color

Line color of the enclosing box (if different from the text color)

linetype

Line type of the enclosing box (like lty in base R)

linewidth

Line width of the enclosing box (measured in mm, just like size in ggplot2::element_line()).

hjust

Horizontal justification

vjust

Vertical justification

halign

Horizontal justification

valign

Vertical justification

angle

Angle (in degrees)

lineheight

Line height

padding, margin

Padding and margins around the text box. See gridtext::richtext_grob() for details.

r

Unit value specifying the corner radius of the box

align_widths, align_heights

Should multiple elements be aligned by their widths or height? See gridtext::richtext_grob() for details.

rotate_margins

Should margins get rotated in frame with rotated text? If TRUE, the margins are applied relative to the text direction. If FALSE, the margins are applied relative to the plot direction, i.e., the top margin, for example, is always placed above the text label, regardless of the direction in which the text runs. The default is FALSE, which mimics the behavior of element_text().

debug

Draw a debugging box around each label

inherit.blank

See ggplot2::margin() for details.

Value

A ggplot2 theme element that can be used inside a ggplot2::theme() call.

See Also

gridtext::richtext_grob(), element_textbox(), geom_richtext()

Theme element that enables markdown text in a box.

Description

The theme elements element_textbox() and element_textbox_simple() enable Markdown text in a box, with word wrap. Both functions implement exactly the same functionality; they only differ in the default values for the various element values. element_textbox() sets all values that are not specified to NULL, as is the usual practice in ggplot2 themes. These missing values are usually completed by inheritance from parent theme elements. By contrast, element_textbox_simple() provides meaningful default values for many of the values that are not usually defined in ggplot2 themes. This makes it simpler to use a textbox element in the context of an existing theme.

Usage

element_textbox(
  family = NULL,
  face = NULL,
  size = NULL,
  colour = NULL,
  fill = NULL,
  box.colour = NULL,
  linetype = NULL,
  linewidth = NULL,
  hjust = NULL,
  vjust = NULL,
  halign = NULL,
  valign = NULL,
  lineheight = NULL,
  margin = NULL,
  padding = NULL,
  width = NULL,
  height = NULL,
  minwidth = NULL,
  maxwidth = NULL,
  minheight = NULL,
  maxheight = NULL,
  r = NULL,
  orientation = NULL,
  color = NULL,
  box.color = NULL,
  debug = FALSE,
  inherit.blank = FALSE
)

element_textbox_simple(
  family = NULL,
  face = NULL,
  size = NULL,
  colour = NULL,
  fill = NA,
  box.colour = NULL,
  linetype = 0,
  linewidth = 0.5,
  hjust = 0.5,
  vjust = 0.5,
  halign = 0,
  valign = 1,
  lineheight = 1.2,
  margin = ggplot2::margin(0, 0, 0, 0),
  padding = ggplot2::margin(0, 0, 0, 0),
  width = grid::unit(1, "npc"),
  height = NULL,
  minwidth = NULL,
  maxwidth = NULL,
  minheight = NULL,
  maxheight = NULL,
  r = grid::unit(0, "pt"),
  orientation = "upright",
  color = NULL,
  box.color = NULL,
  debug = FALSE,
  inherit.blank = FALSE
)

Arguments

family

Font family

face

Font face

size

Font size (in pt)

colour, color

Text color

fill

Fill color of the enclosing box

box.colour, box.color

Line color of the enclosing box (if different from the text color)

linetype

Line type of the enclosing box (like lty in base R)

linewidth

Line width of the enclosing box (measured in mm, just like size in ggplot2::element_line()).

hjust

Horizontal justification

vjust

Vertical justification

halign

Horizontal justification

valign

Vertical justification

lineheight

Line height, in multiples of the font size

padding, margin

Padding and margins around the text box. See gridtext::textbox_grob() for details.

width, height

Unit objects specifying the width and height of the textbox, as in gridtext::textbox_grob().

minwidth, minheight, maxwidth, maxheight

Min and max values for width and height. Set to NULL to impose neither a minimum nor a maximum.

r

Unit value specifying the corner radius of the box

orientation

Orientation of the text box. See gridtext::textbox_grob() for details.

debug

Not implemented.

inherit.blank

See ggplot2::margin() for details.

Value

A ggplot2 theme element that can be used inside a ggplot2::theme() call.

See Also

gridtext::textbox_grob(), element_markdown(), geom_textbox()

Examples

library(ggplot2)

ggplot(mtcars, aes(disp, mpg)) + 
geom_point() +
  labs(
    title =
    "<b><span style = 'font-size:13pt'>Fuel economy vs. engine displacement</span></b><br>
    Lorem ipsum *dolor sit amet,* consectetur adipiscing elit, **sed do eiusmod tempor
    incididunt** ut labore et dolore magna aliqua. <span style = 'color:red;'>Ut enim ad
    minim veniam,</span> quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
    commodo consequat.",
    x = "displacement (in<sup>3</sup>)",
    y = "Miles per gallon (mpg)<br><span style = 'font-size:8pt'>A measure of
    the car's fuel efficiency.</span>"
  ) +
  theme(
    plot.title.position = "plot",
    plot.title = element_textbox_simple(
      size = 10,
      padding = margin(5.5, 5.5, 5.5, 5.5),
      margin = margin(0, 0, 5.5, 0),
      fill = "cornsilk"
    ),
    axis.title.x = element_textbox_simple(
      width = NULL,
      padding = margin(4, 4, 4, 4),
      margin = margin(4, 0, 0, 0),
      linetype = 1,
      r = grid::unit(8, "pt"),
      fill = "azure1"
    ),
    axis.title.y = element_textbox_simple(
      hjust = 0,
      orientation = "left-rotated",
      minwidth = unit(1, "in"),
      maxwidth = unit(2, "in"),
      padding = margin(4, 4, 2, 4),
      margin = margin(0, 0, 2, 0),
      fill = "lightsteelblue1"
    )
  )

Richtext labels

Description

This geom draws text labels similar to ggplot2::geom_label(), but formatted using basic markdown/html. Parameter and aesthetic names follow the conventions of ggplot2::geom_label(), and therefore the appearance of the frame around the label is controlled with label.colour, label.padding, label.margin, label.size, label.r, even though the same parameters are called box.colour, box.padding, box.margin, box.size, and box.r in geom_textbox(). Most styling parameters can be used as aesthetics and can be applied separately to each text label drawn. The exception is styling parameters that are specified as grid units (e.g., label.padding or label.r), which can only be specified for all text labels at once. See examples for details.

Usage

geom_richtext(
  mapping = NULL,
  data = NULL,
  stat = "identity",
  position = "identity",
  ...,
  nudge_x = 0,
  nudge_y = 0,
  label.padding = unit(c(0.25, 0.25, 0.25, 0.25), "lines"),
  label.margin = unit(c(0, 0, 0, 0), "lines"),
  label.r = unit(0.15, "lines"),
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

Arguments

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. A function can be created from a formula (e.g. ~ head(.x, 10)).

stat

The statistical transformation to use on the data for this layer, as a string.

position

Position adjustment, either as a string, or the result of a call to a position adjustment function. Cannot be jointy specified with nudge_x or nudge_y.

...

Other arguments passed on to layer(). These are often aesthetics, used to set an aesthetic to a fixed value, like colour = "red" or size = 3. They may also be parameters to the paired geom/stat.

nudge_x

Horizontal and vertical adjustment to nudge labels by. Useful for offsetting text from points, particularly on discrete scales. Cannot be jointly specified with position.

nudge_y

Horizontal and vertical adjustment to nudge labels by. Useful for offsetting text from points, particularly on discrete scales. Cannot be jointly specified with position.

label.padding

Amount of padding around label. Defaults to 0.25 lines.

label.margin

Unit vector of length four specifying the margin outside the text label.

label.r

Radius of rounded corners. Defaults to 0.15 lines.

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. It can also be a named logical vector to finely select the aesthetics to display.

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().

Value

A ggplot2 layer that can be added to a plot created with ggplot2::ggplot().

Aesthetics

geom_richtext() understands the following aesthetics (required aesthetics are in bold; select aesthetics are annotated):

See Also

geom_textbox(), element_markdown()

Examples

library(ggplot2)

df <- data.frame(
  label = c(
    "Some text **in bold.**",
    "Linebreaks<br>Linebreaks<br>Linebreaks",
    "*x*<sup>2</sup> + 5*x* + *C*<sub>*i*</sub>",
    "Some <span style='color:blue'>blue text **in bold.**</span><br>And *italics text.*<br>
      And some <span style='font-size:18pt; color:black'>large</span> text."
  ),
  x = c(.2, .1, .5, .9),
  y = c(.8, .4, .1, .5),
  hjust = c(0.5, 0, 0, 1),
  vjust = c(0.5, 1, 0, 0.5),
  angle = c(0, 0, 45, -45),
  color = c("black", "blue", "black", "red"),
  fill = c("cornsilk", "white", "lightblue1", "white")
)

ggplot(df) +
  aes(
    x, y, label = label, angle = angle, color = color, fill = fill,
    hjust = hjust, vjust = vjust
  ) +
  geom_richtext() +
  geom_point(color = "black", size = 2) +
  scale_color_identity() +
  scale_fill_identity() +
  xlim(0, 1) + ylim(0, 1)
  
# labels without frame or background are also possible
ggplot(df) +
  aes(
    x, y, label = label, angle = angle, color = color,
    hjust = hjust, vjust = vjust
  ) +
  geom_richtext(
    fill = NA, label.color = NA, # remove background and outline
    label.padding = grid::unit(rep(0, 4), "pt") # remove padding
  ) +
  geom_point(color = "black", size = 2) +
  scale_color_identity() +
  xlim(0, 1) + ylim(0, 1)

Draw boxes containing text

Description

Draw boxes of defined width and height containing word-wrapped text. Multiple boxes can be drawn at once. Most styling parameters can be used as aesthetics and can be applied separately to each text box drawn. The exception is styling parameters that are specified as grid units (e.g., box.padding or box.r), which can only be specified for all text boxes at once. See examples for details.

Usage

geom_textbox(
  mapping = NULL,
  data = NULL,
  stat = "identity",
  position = "identity",
  ...,
  nudge_x = 0,
  nudge_y = 0,
  box.padding = unit(c(5.5, 5.5, 5.5, 5.5), "pt"),
  box.margin = unit(c(0, 0, 0, 0), "pt"),
  box.r = unit(5.5, "pt"),
  width = unit(2, "inch"),
  minwidth = NULL,
  maxwidth = NULL,
  height = NULL,
  minheight = NULL,
  maxheight = NULL,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

Arguments

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. A function can be created from a formula (e.g. ~ head(.x, 10)).

stat

The statistical transformation to use on the data for this layer, as a string.

position

Position adjustment, either as a string, or the result of a call to a position adjustment function. Cannot be jointy specified with nudge_x or nudge_y.

...

Other arguments passed on to layer(). These are often aesthetics, used to set an aesthetic to a fixed value, like colour = "red" or size = 3. They may also be parameters to the paired geom/stat.

nudge_x, nudge_y

Horizontal and vertical adjustment to nudge text boxes by. Useful for offsetting text from points, particularly on discrete scales. Cannot be jointly specified with position.

box.padding

Unit vector of length four specifying the padding inside the text box.

box.margin

Unit vector of length four specifying the margin outside the text box.

box.r

Unit vector of length one specifying the radius of the box.

width, height

Unit values specifying the width and height of the text box (including margins!). If height = NULL (the default), the height is chosen automatically to accommodate all the text.

minwidth, maxwidth, minheight, maxheight

Unit values specifying the minimum and maximum values for width and height, respectively. If set to NULL, are not enforced.

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. It can also be a named logical vector to finely select the aesthetics to display.

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().

Value

A ggplot2 layer that can be added to a plot created with ggplot2::ggplot().

Aesthetics

geom_textbox() understands the following aesthetics (required aesthetics are in bold; select aesthetics are annotated):

See Also

geom_richtext(), element_textbox()

Examples

library(ggplot2)

df <- data.frame(
  label = rep("Lorem ipsum dolor **sit amet,** consectetur adipiscing elit,
    sed do *eiusmod tempor incididunt* ut labore et dolore magna
    aliqua.", 2),
  x = c(0, .6),
  y = c(1, .6),
  hjust = c(0, 0),
  vjust = c(1, 0),
  orientation = c("upright", "right-rotated"),
  color = c("black", "blue"),
  fill = c("cornsilk", "white")
)

ggplot(df) +
  aes(
    x, y, label = label, color = color, fill = fill,
    hjust = hjust, vjust = vjust,
    orientation = orientation
  ) +
  geom_textbox(width = unit(0.4, "npc")) +
  geom_point(color = "black", size = 2) +
  scale_discrete_identity(aesthetics = c("color", "fill", "orientation")) +
  xlim(0, 1) + ylim(0, 1)

Improved text rendering support for ggplot2

Description

The ggtext package implements both geoms (geom_richtext(), geom_textbox()) and theme elements (element_markdown(), element_textbox()) for improved text rendering with ggplot2.