限制R中绘图中水平线的长度

Question

我正在尝试使用abline在绘图上绘制水平线

代码如下:

plot(c(-2,3), c(-1,5), type = "n", xlab = "x", ylab = "y", asp = 1)
abline(h = 0, v = 0, col = "gray60")

我得到的输出是

我在寻找什么 是

如何使abline绘制的线条限制在绘图区域内，如图2所示。

Answer 1

开发有关 xpd 参数如何使用的注释:

来自 par 帮助: xpd 参数是“逻辑值或 NA。如果FALSE，所有绘图都剪切到绘图区域，如果 TRUE，所有绘图都剪切到图形区域，如果 NA，所有绘图都剪切到设备区域"

说明:

par(xpd=T)
plot(c(-2,3), c(-1,5), type = "n", xlab = "x", ylab = "y", asp = 1)
abline(h = 0, v = 0, col = "gray60")

给出:

同时

par(xpd=F) # this is the default value
plot(c(-2,3), c(-1,5), type = "n", xlab = "x", ylab = "y", asp = 1)
abline(h = 0, v = 0, col = "gray60")

给出:

最后，

par(xpd=NA,mfrow=c(1,2))
plot(c(-2,3), c(-1,5), type = "n", xlab = "x", ylab = "y", asp = 1)
abline(h = 0, v = 0, col = "gray60")

给出: