letterToPolygon: Convert an image file to a polygon

In gglogo: Geom for Logo Sequence Plots

Description

Convert an image file to a polygon

Usage

letterToPolygon(
  ch,
  fontfamily = "Helvetica",
  fontsize = 576,
  tol = 1,
  dim = c(480, 480),
  threshold = 0.5,
  var = "red"
)

Arguments

ch	letter
fontfamily	R has a few default fonts that are always available, such as e.g. Helvetica, Arial, Courier New, and Garamond. Other fonts might be available depending on the platform used.
fontsize	by default 576. If the resulting string exceeds the boundary of the matrix returned, reduced font size
tol	tolerance
dim	vector of length two specifying width and height (in pixels) of the temporary jpg file created for the letter. Defaults to 480 x 480 pixels.
threshold	numerical cutoff between 0 and 1
var	one of "red", "green", "blue".

Examples

library(ggplot2)
letter <- letterToPolygon("R", fontfamily="Helvetica")
qplot(x, y, geom="polygon", data = letter, fill=I("black"), alpha=I(0.8))+
     coord_equal()

Example output

Attaching package: 'ggplot2'

The following object is masked from 'package:gglogo':

    fortify

gglogo documentation built on Jan. 29, 2020, 1:09 a.m.