knitr::opts_chunk$set(echo = TRUE)
par(mar = rep(3, 4)) for (i in seq(pi/2, -4/3 * pi, length = 12)) { plot(0, 0, pch = 20, ann = FALSE, axes = FALSE) arrows(0, 0, cos(i), sin(i)) axis(1, 0, "VI"); axis(2, 0, "IX") axis(3, 0, "XII"); axis(4, 0, "III"); box() }
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