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This is a generic function that does the hard work for picture when drawing paths of a "Picture" object as part of the current plot.
picture
"Picture"
drawPath(p, trans, ...)
A "Picture" object.
A function that takes two arguments, x and y, and can be used to transform the locations on a path into sensible coordinates within the current plot.
x
y
Other arguments, typically graphical parameters.
picture and grid.picture
grid.picture