如何向 ggplot 添加另一层/新系列？

发布于 2024-08-23 01:13:27 字数 408 浏览 6 评论 0原文

在 ggplot 中，我可以将一个系列添加到绘图中：

ggplot(diamonds, aes(x = carat, y = price)) + geom_point()

如何简单地添加另一个系列，例如绘制红宝石与钻石的成本。假设红宝石也在钻石数据集中。我尝试在上面放置另一层红宝石数据，但它只绘制红宝石而不是钻石/克拉。

ggplot(diamonds, aes(x = carat, y = price)) + geom_point() + aes(x = rubies, y = price)

我可以看到，通过首先将所有数据融合在一起，准备绘制它，这是可能的，所以也许我应该走这条路。然而，仅仅在这样的情节中添加另一个系列似乎应该不会太难，但我不知道该怎么做。

原文

In ggplot I can add a series to a plot with:

ggplot(diamonds, aes(x = carat, y = price)) + geom_point()

How do I simply add another series, e.g. plotting the cost of rubies against diamonds. Assuming rubies was also in the diamonds dataset. I have tried to lay over the top another layer with the rubies data, but it just plots the rubies and not the diamonds/carat.

ggplot(diamonds, aes(x = carat, y = price)) + geom_point() + aes(x = rubies, y = price)

I can see that this would be possible by melding all the data together first, ready to plot it, so maybe I should go down that route. However, just adding another series to a plot like this seems like it should not be too hard, but I can't figure out how to do it.

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梦在深巷 2024-08-30 01:13:27

rubies  <- data.frame(carat = c(3, 4, 5), price= c(5000, 5000, 5000))

ggplot(diamonds, aes(carat, price)) + 
  geom_point() + 
  geom_point(data = rubies, colour = "red")

rubies  <- data.frame(carat = c(3, 4, 5), price= c(5000, 5000, 5000))

ggplot(diamonds, aes(carat, price)) + 
  geom_point() + 
  geom_point(data = rubies, colour = "red")

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