如何使x轴以ggplot2中的零拦截y轴

发布于 2025-02-12 04:47:36 字数 458 浏览 1 评论 0原文

我有一个简单的线图，其中包含y轴上的点小于零。 x轴位于图的底部，因此不会在y = 0时截距y轴。

如何使x =轴在ggplot2中截取y = 0？

示例代码：

df <- data.frame(x = 1:20, y = seq(-30, 65, by = 5))
p <- ggplot(df, aes(x, y)) +
    geom_line() +
    geom_hline(yintercept = 0, linetype = "dashed", color = "blue")
p

非常感谢！

原文

I have a simple line graph, that contains points less than zero on the y-axis. The x-axis is at the bottom of the graph, and thus does not intercept the y-axis at y = 0.

How can I get the x=axis to intercept at y=0 in ggplot2?

Example code:

df <- data.frame(x = 1:20, y = seq(-30, 65, by = 5))
p <- ggplot(df, aes(x, y)) +
    geom_line() +
    geom_hline(yintercept = 0, linetype = "dashed", color = "blue")
p

Line graph

Many thanks in advance!

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烂柯人 2025-02-19 04:47:37

选项1：用coord_cartesian

df <- data.frame(x=c(-5, 15),
                 y=c(-25, 25))
ggplot(df, aes(x,y)) + 
  geom_line() +
  geom_hline(yintercept = 0, linetype = "solid", color = "black") +
  coord_cartesian(ylim=c(0,50))

选项2：手动移动Xaxis标签。

ggplot(df, aes(x,y)) + 
  geom_line() +
  geom_hline(yintercept = 0, linetype = "solid", color = "black") +
  theme(axis.text.x = element_text(vjust = 120))

Option 1: Limit the y-axis display with coord_cartesian

df <- data.frame(x=c(-5, 15),
                 y=c(-25, 25))
ggplot(df, aes(x,y)) + 
  geom_line() +
  geom_hline(yintercept = 0, linetype = "solid", color = "black") +
  coord_cartesian(ylim=c(0,50))

Option 2: Shift the xaxis label manually.

ggplot(df, aes(x,y)) + 
  geom_line() +
  geom_hline(yintercept = 0, linetype = "solid", color = "black") +
  theme(axis.text.x = element_text(vjust = 120))