是否可以向ggplot图例添加自定义形状(从png)? [英] Is it possible to add custom shapes ( from png) to ggplot legend?

问题描述

我想知道是否可以为ggimage()的图例添加形状.我发现了类似的问题，但它们要么是1)图例中具有不同颜色的同一张图片，要么是2)同一张图片具有不同的颜色.我使用了此链接将具有颜色的图像添加到图例中，但是我不知道如何编辑它，以便图像会有所不同.我尝试了此，但是我还不足以调整代码以适应我的情况

I was wondering whether it is possible to add shapes to the legend for ggimage(). I found similar questions, but they either have 1) same picture with a different color in legend, or 2) same picture different colors. I used this link to add images to the legend that have color, but i can't figure out how to edit it so that image will be different. I tried this, but I am not advance enough to adjust the code to fit my case

d <- data.frame(x = rnorm(10),
                y = rnorm(10),
                image = sample(c("https://www.r-project.org/logo/Rlogo.png",
                                 "https://jeroenooms.github.io/images/frink.png"),
                               size=10, replace = TRUE)
)

ggplot(d, aes(x, y)) + geom_image(aes(image=image, color=image), size=.05)

推荐答案

使用ggdraw解决: p2在ggplot()对象上，在该对象中我在行中绘制图像(坐标x = 2，y = c(1,2))并添加了文本(坐标x = 2.5，y = c(1,2))

Solved by ussing ggdraw: p2 os the ggplot() object where I ploted images in row (coordinates x=2, y = c(1,2) ) and added text (coordinates x=2.5, y=c(1,2))

ggdraw() +
  draw_plot(p1) +
  draw_plot(p2, x = 0.55, y = 0.6)

然后我只是在尝试p2的位置，并在p2中添加xlim和ylim以使文本和图像在一起

And then I just play around with the position of p2 as well as added xlim and ylim to p2 to make text and image together

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