例如，我想绘制一个内部有网格的方框，代码如下：
plot(rnorm(10), rnorm(10), type = "n", asp = 1, xlim = c(0, 1), ylim = c(0, 1), axes = FALSE, pty = "s", bty = "o", xlab = "", ylab = "")
abline(h = seq(0, 1, 0.2), v = seq(0, 1, 0.2), col = "lightgray")
abline(a = 0, b = 1, col = "lightgray")
axis(1, seq(0, 1, 0.2), seq(0, 1, 0.2), pos = 0)
axis(2, seq(0, 1, 0.2), seq(0, 1, 0.2), pos = 0)
但这些线超出了面积(0，0(到(1，1(，就像有须的盒子一样。这可能是绘图区域的问题，我如何将绘图区域精确地限制在区域内，例如从(0，0(到(1，1(？
非常感谢！
plot(rnorm(10), rnorm(10), type = "n", asp = 1, xlim = c(0, 1), ylim = c(0, 1),
axes = FALSE, pty = "s", bty = "o", xlab = "", ylab = "")
axis(1, seq(0, 1, 0.2), seq(0, 1, 0.2), pos = 0)
axis(2, seq(0, 1, 0.2), seq(0, 1, 0.2), pos = 0, las=1)
可以使用clip来防止注释扩展到剪辑区域之外。这四个参数确定了用于剪裁的矩形的两个坐标。
clip(0,1,0,1)
abline(h = seq(0, 1, 0.2), v = seq(0, 1, 0.2), col = "lightgray")
abline(a = 0, b = 1, col = "lightgray")