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Post text (in an xbox)

Source: R/plot_text_calls.R
post.Rd

post plots 1 or more text strings (provided as a character vector labels) to an (existing or new) xbox.

Usage

post(
  labels,
  x = 0.03,
  y = 0.55,
  x_layout = NA,
  y_layout = "even",
  col = "white",
  col_bg = Seeblau,
  cex = 1,
  font = 1,
  new_plot = "none"
)

Arguments

labels

A character vector specifying the text labels to be plotted.

x

A numeric vector of x-coordinates at which the text labels in labels should be written. If the lengths of x and y differ, the shorter one is recycled. Default: x = .03.

y

A numeric vector of y-coordinates at which the text labels in labels should be written. If the lengths of x and y differ, the shorter one is recycled. Default: y = .55.

x_layout

An optional numeric vector or character string to control the horizontal positions of labels. Numeric values are interpreted as increments to values of x and recycled (to enable stepwise or alternating patterns). 3 character string options are: "center" (i.e., center wrt. first label or plot center), "left" (i.e., left wrt. first label or plot center), "right" (i.e., right wrt. first label or plot center). Default: x_layout = NA (i.e., using values of x).

y_layout

A numeric value or character string to control the vertical positions of labels. Numeric values are interpreted as increments to values of y[1] and recycled (to enable stepwise or alternating patterns). 2 character string options are: "even" (i.e., even distribution of labels across available y-space) and "flush" (i.e., no space between adjacent labels, i.e., y_layout = 0). Default: y_layout = "even".

col

The color(s) of the text label(s). Default: col_lbl = "white".

col_bg

The background color(s) of the xbox. Default: col_bg = Seeblau.

cex

Numeric character expansion factor(s), multiplied by par("cex") to yield the character size(s). Default: cex = 1.0.

font

The font type(s) to be used. Default: font = 1 (i.e., plain text).

new_plot

Should a new plot be generated? Set to "xbox" to plot to a basic xbox (with square dimensions, i.e., dim = c(1, 1)). Default: new_plot = "none" (i.e., assumes a pre-existing xbox).

Details

The positions of the text elements in labels can be specified by providing their coordinates (as x and y arguments) or by providing an initial position and an y_layout (see below).

Text formatting parameters (like col, col_bg, cex, font) are recycled to match length(labels).

post uses the base graphics system graphics::.

See also

xbox to create a new xbox (without text).

Other text functions: mark(), uline(), url_unikn()

Examples

# Create a new xbox: 
post(labels = "This is a test.", new_plot = "xbox", 
     cex = 1.2, font = 2, col_bg = pal_seeblau[[5]])

# Add text to an existing xbox: 
post(labels = c("More text follows here,",
              "yet another line here,",
              "and even more here."), 
              y = .4, y_layout = .04, 
              new_plot = "none")

              
# Using x_layout and y_layout:
post(labels = c("Ene,", "mene, miste,", "es rappelt", "in der Kiste."), 
     cex = 1.4, font = 2, col = "white", col_bg = Pinky, 
     x = .1, y = .5, x_layout = "left", y_layout = .05, new_plot = "xbox")

     
post(labels = c("Hello world!", "Does this work?", "That's good!", "Please carry on..."), 
     cex = 1.4, font = 2, col = "white", col_bg = Karpfenblau, 
     x = .01, y = .6, x_layout = .10, y_layout = .05, new_plot = "xbox")