R legend pch mix of character and numeric

Question

Is it possible to use a mix of character and number as plotting symbols in R legend?

plot(x=c(2,4,8),y=c(5,4,2),pch=16)
points(x=c(3,5),y=c(2,4),pch="+")
legend(7,4.5,pch=c("+",16),legend=c("A","B")) #This is the problem

Answer 1

Use the numerical equivalent of the "+" character:

plot(x=c(2,4,8),y=c(5,4,2),pch=16)
points(x=c(3,5),y=c(2,4),pch="+")
legend(7,4.5,pch=c(43,16),legend=c("A","B"))

Answer 2

There are actually numerical equivalents for all symbols!

^{Source: Dave Roberts}

The pch code is the concatenation of the Y and X coordinates of the above plot.

• For example, the + symbol is in row (Y) 4 and column (X) 3, and therefore can be drawn using pch = 43.

Example:

plot(x=c(2,4,8),y=c(5,4,2),pch=16)
points(x=c(3,5),y=c(2,4),pch="+")
legend(7,4.5,pch=c(43,16),legend=c("A","B"))