Displays the available plotting marks. Where specified, the ‘rgr’ functions use a plus sign,
pch = 3, as the plotting symbol, alternate plotting marks may be selected from this display. For example,
pch = 1 results in an open circle, the R default, and
pch = 4 results in a cross, ‘x’. For additional symbols available only in R (
pch = 19:25) see
Function to display
pch codes based on a script originally shared on S-News by Bill Venables, 1996/07, and modified by Shawn Boles, 1996/07/31.
Various, see Note
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