A simple wrapper on plot with all
default values set to create a blank plot space.
Specifically, x = 1, y = 1, type = "n",
xlab = "", ylab = "", xaxt = "n", yaxt = "n",
and bty = "n". Any of the input values can be overwritten within
this function's call.
blank(
x = 1,
y = 1,
type = "n",
xlab = "",
ylab = "",
xaxt = "n",
yaxt = "n",
bty = "n",
...
)if (FALSE) {
blank()
}