在 plotly 中格式化长文本标签的工具提示

Question

考虑下面的简单示例。有没有一种方法可以格式化 plotly 工具提示，使长文本标签在框中可见，而不是这个切断值的荒谬矩形？

library(ggplot2); library(plotly)

df <- data.frame(x = 1:10, y = 1:10, z = rep("the longggggggggggggggggggggggggggggestttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt labelllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll you can imagineeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee", 10))

p <- ggplot(df, aes(x,y,label=z)) + geom_point()
ggplotly(p, tooltip = "label")

Answer 1

我很确定，某个地方存在更优雅的解决方案。我只能建议你像每个 n 字符一样休息一下。 :

有一个很好的解决方法

gsub('(.{1,90})(\s|$)', '\1\n', s)

It will break string "s" into lines with maximum 90 chars (excluding the line break character "\n", but including inter-word spaces), unless there is a word itself exceeding 90 chars, then that word itself will occupy a whole line.

所以我们只需要将gsub()添加到ggplot美学中：

p <- ggplot(df, aes(x,y,
            text = gsub('(.{1,20})(\s|$)', '\1\n', z))) +
  geom_point()

ggplotly(p, tooltip = "text")

更新

这是@Rich Pauloo 评论中的一个更优雅的解决方案。在这种情况下，您的字符串也将大部分被左填充（但实际上是自动对齐的）。但是，填充取决于绘图分辨率和标签位置。

library(stringr)

p <- ggplot(df,
            aes(x, y,
                text = stringr::str_wrap(
                  string = z,
                  width = 20,
                  indent = 1, # let's add extra space from the margins
                  exdent = 1  # let's add extra space from the margins
                ))) +
  geom_point()

ggplotly(p, tooltip = "text")

在 plotly 中格式化长文本标签的工具提示

Format tooltip in plotly for long text labels

r

ggplot2

plotly

ggplotly