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Assigns plotting characters (pch values) to a vector

Source: R/helpers.R
assign-pch.Rd

assign_pch() maps discrete variables to six easily discernible shapes. If you have more than six levels, you will get a warning message, and the seventh and subsequent levels will not appear on the plot. You can not map a continuous variable to shape unless assign_pch_binned() is used.

Usage

assign_pch(x, solid = TRUE)

assign_pch_binned(x, solid = TRUE, breaks = 6)

legend_pch(x, solid = TRUE, breaks = NULL, position = "topright", ...)

Arguments

x

vector.

solid

Should the plotting character be solid, TRUE (the default), or hollow, FALSE?

breaks

integer giving the desired number of intervals. Non-integer values are rounded down.

position

Legend position. Either a two-column vector of the x and y coordinates, or a keyword from the list "bottomright", "bottom", "bottomleft", "left", "topleft", "top", "topright", "right" and "center".

...

arguments passed to graphics::legend()

Value

named integer vector

See also

Other assign: assign-cex, assign-color

Examples

set.seed(20250411)

# example for discrete colors
x <- rvmf(5, mu = Line(120, 50), k = 5)
key <- sample(letters, 5, replace = TRUE)
plot(x, pch = assign_pch(key), grid.params = list(guides = FALSE))
legend_pch(key)