更改ggplot直方图的x轴标签 [英] Changing the x-axis labels of a ggplot histogram

问题描述

我有以下数据集(为便于阅读而进行了编辑):

I have the following dataset (edited for readability):

chol <- read.table(url("http://assets.datacamp.com/blog_assets/chol.txt"), header = TRUE)

我正在创建数据的直方图:

And I am creating a histogram of the data doing:

ggplot(data=chol, aes(chol$AGE)) + geom_histogram()

对于一个特定的示例，我想更改x标签.

For a particular example I would like to change the x-labels however.

有什么想法可以解决这个问题吗?

Any thoughts on how I can pull this of?

推荐答案

为说明答案(并更好地理解问题)，使用图片:

To illustrate the answer (and better understand the question) a picture:

> require(ggplot2)
> chol <- read.table(url("http://assets.datacamp.com/blog_assets/chol.txt"), header = TRUE)
> ggplot(data=chol, aes(chol$AGE)) + geom_histogram()

产量:

在 http:/上有文档(因为我们有连续的轴而不是离散的轴)/docs.ggplot2.org/current/scale_continuous.html

对于离散轴，可以简单地写:

For a discrete axis one might have simply written:

> p <- ggplot(data=chol, aes(chol$AGE)) + geom_histogram() + scale_x_discrete(labels=c("20" = "twe", "30" = "thi", "40" = "fou", "50" = "fif", "60" = "six"))  # does NOT work cf. surrounding text.

连续轴至少允许格式化(有关详细信息，请参阅链接).

A continuous axis at least allows formatting (cf. link for details).

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