如何在图例中更改符号而不更改图中的符号 [英] How to change symbol in legend without changing it in the plot

问题描述

我正在尝试复制以下情节: 要复制的图

I'm trying to replicate the following plot: Plot to replicate

我已经了解到了以下内容:我的情节

I have gotten as far as this: My plot

因此，剩下要做的就是将图例中的符号更改为大圆形圆圈，而不是带有穿过它们的直线的小圆圈.如何在不扩大情节范围的情况下实现这一目标?

Hence, the only thing left to do is change the symbols in the legend to big round circles instead of small circles with a line going through them. How can I achieve this without making the circles in my plot bigger?

到目前为止，我已使用以下代码创建绘图:

I used the following code to create my plot so far:

g <- ggplot(d, aes(x = Num.3.Syllable.Words / Num.Words,
                   y = Num.Words / Num.Sentences, colour = Educational.Level)) 

g +
  geom_point() + geom_smooth(method = "lm", se = FALSE) +
  facet_grid(Educational.Level ~ .) +
  scale_x_continuous(breaks = c(0.05, 0.15, 0.25), labels = scales::percent) +
  scale_y_continuous(breaks = c(10, 20)) +
  labs(x = "Share of words with 3+ syllables", 
       y = "Words per sentence",
       colour = "Educational level", 
       title = "Ad Copy Complexity in Magazines", 
       subtitle = "Arranged by Typical Readership")

我要添加什么?我可以使用指南功能吗?提前致谢.

What do I add? Do I use the guides function? Thanks in advance.

推荐答案

您可以通过覆盖此类指南来实现此目的...

You can do this by overwriting the guides like this...

ggplot(mtcars, aes(hp, mpg, group=gear, color=as.factor(gear))) + 
  geom_point() + 
  geom_line() + 
  guides(color = guide_legend(override.aes = list(linetype = 0, size=5)))

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