绘制R:当每个x因子水平存在两个值时，无法获得要绘制的点 [英] Plotly R: Cant get points to plot when two values present per x factor level

问题描述

我有一个像这样的数据框:

I have a data frame like this:

dput(df)
structure(list(x = structure(c(1L, 2L, 3L, 4L, 5L, 1L, 2L, 3L, 
4L, 5L), .Label = c("41197708", "41223094", "41244000", "41244435", 
"41244936"), class = "factor"), y = c(1, 1, 1, 1, 1, 2, 2, 2, 
2, 2)), .Names = c("x", "y"), row.names = c(NA, -10L), class = "data.frame")

尝试如下打印点的散点图:

Trying to print a scatter plot with points as follows:

plot_ly(df, x = levels(x), y = y, mode = 'markers')

我只看到对应于y = 1的点，而不是y =2.知道为什么吗?

I only see points corresponding to y = 1 and not y = 2. Any idea why?

以下内容在绘图中有效，但是随后将x轴值视为数字/连续值(不是我想要的值):

The following works in plotly, but then it treats x axis values as numeric / continuous (not what I want):

plot_ly(df, x = x, y = y, mode = 'markers')

推荐答案

这不是您的上一个问题的重复副本，并且与此 github问题相关吗?

Isn't this a duplicate of your previous question and related to this github issue ?

当前，您需要手动指定您具有分类 轴.

Currently you need to manually specify that you have a categorical axis.

plot_ly(df, x = x, y = y, mode = "markers") %>% layout(xaxis = list(type = "category"))

现在，我们刚刚将因子水平作为字符串发送给 plotly.js

Right now we just sent the factor levels as a string to plotly.js

plotly_build(plot_ly(df, x = x, y = y, mode = "markers"))$data[[1]]$x

基于这些字符串，plotly.js(正确)认为您需要 数字轴.将来，我们应该设置更智能的轴类型默认值 基于变量映射.

Based on those strings, plotly.js (correctly) thinks that you want a numeric axis. In the future, we should set smarter axis type defaults based on the variable mappings.

如果您这样做:

plot_ly(df, x = x, y = y, mode = "markers") %>% 
      layout(xaxis = list(type = "category"))

您将获得:

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