Panel Function for Euler Ellipses
panel.euler.ellipses(x, y, ra, rb, phi, border = "black",
fill = "transparent", n = 200, ..., identifier = NULL,
name.type = "panel", col, font, fontface)X coordinates for the centers.
Y coordinates for the centers.
Semi-major axes.
Semi-minor axes.
Rotation of the ellipse (as the counter-clockwise angle from the positive x-axis to the semi-major axis).
Border color.
Ellipse fill.
Number of vertices to draw for each ellipse.
Passed on to grid::grid.polygon().
A character string that is prepended to the name of the grob that is created.
A character value indicating whether the name of the grob
should have panel or strip information added to it. Typically either
"panel", "strip", "strip.left", or "" (for no extra information).
Ignored
Ignored
Ignored
Plots ellipses inside a trellis panel.