polygons of upper and lower case letters and digits 0-9
data(alphabet)data(alphabet_comic)
data(alphabet_xkcd)
data(alphabet_braille)
alphabet polygon data
The alphabet polygon data is based on the font Helvetica. Upper and lower case letters are included as well as digits. Other alphabet data are `alphabet_comic` (based on Comic Sans MS), `alphabet_xkcd` (based on the xkcd font), and `alphabet_braille` (based on Swell Braille)