r - 向图表添加垂直线

Question

我想在我的时间序列图顶部以均匀的间隔添加垂直点/虚线。

我会在 abline 参数中添加一个额外的命令还是有其他方法？

Answer 1

使用grid :

nx, ny - number of cells of the grid in x and y direction. When NULL, as per default, the grid aligns with the tick marks on the corresponding default axis (i.e., tickmarks as computed by axTicks). When NA, no grid lines are drawn in the corresponding direction.

例子:

plot(1:5)
grid(nx = NULL, ny = NA)