R 如何使用 ggplot 强调 x Axis ？

Question

如果我使用 ggplot，则 x Axis (y==0) 的水平线与 y 的任何其他值相同。我想强调一个事实，即图表的底部不是 x Axis ，并且 x Axis 在图中较高。我怎样才能做到这一点？

data.df <- data.frame(Plant = c("Plant1", "Plant1", "Plant1", "Plant2", "Plant2", "Plant2"), Type = c(1, 2, 3, 1, 2, 3), Axis1 = c(0.2, -0.4, 0.8, -0.2, -0.7, 0.1), Axis2 = c(0.5, 0.3, -0.1, -0.3, -0.1, -0.8))

ggplot(data.df, aes(x = Axis1, y = Axis2, shape = Plant, color = Type)) + geom_point(size = 5)

Answer 1

您可以用黑线突出显示 Axis

ggplot(data.df, aes(x = Axis1, y = Axis2, shape = Plant, color = Type)) +
geom_point(size = 5) +
geom_hline(aes(yintercept = 0)) +
geom_vline(aes(xintercept = 0))