rcs*_*rcs 166
这应该让你开始:
R> qplot(hwy, cty, data = mpg) +
facet_grid(. ~ manufacturer) +
theme(strip.text.x = element_text(size = 8, colour = "orange", angle = 90))
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另请参阅此问题:如何在ggplot2中操作构面图的条带文本?