使用ggplot禁用悬停文本 [英] Disable hover text in plotly with ggplot

问题描述

我想在 plotly 中部分禁用悬停文本，将其限制为 ggplot 中的一个数据框或 geom.在下面的情况下，我只想将鼠标悬停在城市"而不是地图轮廓上.我在 Python 中看到了一个解决方案，但不是 R.我将如何控制图像大小以保持地图尺寸正确?https://plot.ly/ggplot2/interactive-tooltip/ 的地图演示似乎不是关心！

I want to partly disable hover text in plotly, limiting it to one dataframe or geom in ggplot. In the case below, I want hover only on the "cities" not the map outline. I've seen a solution in Python, but not R. And how would I control the image size to keep the map dimension right in plotly? The map demo at https://plot.ly/ggplot2/interactive-tooltip/ seems not to care!

library(mapdata)
library(ggplot2)
library(plotly)


Japan <- map_data("world2Hires", region="Japan")

Longitude <- 140
Latitude <- 36.5
df <- cbind.data.frame(Longitude,Latitude)
df$Name <- "Tokyo"
df$Name_2 <- "Tōkyō"



XX <- ggplot() + geom_polygon(data=Japan, aes(x=long, y=lat, group=group), color="black", fill="white", text="") + coord_equal() + geom_point(data=df, aes(x=Longitude, y=Latitude, text=Name), color="green")
XX 
ggplotly(XX)  ##How to get hover text only on df not Japan, and remove "[object Object]" 

XX <- ggplot() + geom_polygon(data=Japan, aes(x=long, y=lat, group=group), color="black", fill="white", text="") + coord_equal() + geom_point(data=df, aes(x=Longitude, y=Latitude, text=Name_2), color="green")
XX 
ggplotly(XX)  ##Non-Ascii text breaks hover

推荐答案

首先我必须承认，在阅读您的问题之前，我不了解 plotly 和 mapdata 包.但是这些看起来非常有用，我开始玩弄并最终产生了一些有用的东西.

First I have to admit I don't know about plotly and mapdata packages before reading your question. But these look so useful I started playing around and finally produced something useful.

我认为你的一些问题是因为你使用 ggplotly 函数而不是直接 plot_ly 接口，我在我的解决方案中这样做了.

I think some of your problems arising because you use the ggplotly function and not the direct plot_ly interface, which I did in my solution.

数据准备

library(mapdata)
library(ggplot2)
library(plotly)

Japan <- map_data("world2Hires", region="Japan")
Longitude <- 140
Latitude <- 36.5
df <- cbind.data.frame(Longitude,Latitude)
df$Name <- "Tokyo"
df$Name_2 <- "Tōkyō"

地理对象

这里准备了一个虚拟地理对象.这不会绘制任何东西，而是选择要显示的 World 的哪个区域.在这里您还可以设置使用的投影.

Here a dummy geo object is prepared. This doesn't draw anything but selects which region of the World to display. Here you could also set up the used projection.

g <- list(
  showland = F,
  coastlinewidth = 0,
  lonaxis = list(
    showgrid = TRUE,
    gridwidth = 0.5,
    range = c(125, 145.8224),
    dtick = 5
  ),
  lataxis = list(
    showgrid = TRUE,
    gridwidth = 0.5,
    range = c(25, 45.52),
    dtick = 5
  )
)

添加数据

首先用你的观点创建一个 scattergeo 图:

First create a scattergeo plot with only your point:

p <- plot_ly(data = df,lon = Longitude,lat = Latitude,name="City",
             text =Name_2,type = "scattergeo",mode = "markers")

然后添加成本行并禁用悬停信息(hoverinfo = "none"):

Then add the cost line and disable hover info (hoverinfo = "none"):

p <- add_trace(data=Japan,lon = long,lat = lat, 
               mode = "lines",group=group,line = list(color=toRGB("black"),width = 0.5),
               type = "scattergeo",  hoverinfo = "none",showlegend = F)

最后将布局设置为之前定义的geo对象:

Finally set the layout to the previously defined geo object:

p <- layout(p, geo = g)

最后的评论

https://plot.ly/r/reference/#layout-geo 显示可用于地理对象的参数.https://plot.ly/r/lines-on-maps/ 显示一个其中一些的代码示例.

https://plot.ly/r/reference/#layout-geo shows what parameters are available for a geo object. https://plot.ly/r/lines-on-maps/ shows a code example with some of them.

对我来说，使用 Name_2 效果很好，我不知道您对控制图像大小"的意思是什么，您可能想针对您进一步指定所需内容提出不同的问题.祝你好运！

For me using Name_2 works fine and I don't know what you mean with "control the image size" you might want to ask different questions for that where you further specify what you want. Good luck!

这篇关于使用ggplot禁用悬停文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！