跟踪顺序情节 R答案

【问题标题】：trace order plotly R跟踪顺序情节 R
【发布时间】：2019-01-04 13:39:59
【问题描述】：

我正在试图弄清楚如何控制绘制的痕迹的顺序，即如何将痕迹放在前面和后面。

这里有一段简单的代码可以绘制两条轨迹。我该如何决定顺序？

library(plotly)

airquality_sept <- airquality[which(airquality$Month == 9),]
airquality_sept$Date <- as.Date(paste(airquality_sept$Month, 
airquality_sept$Day, 1973, sep = "."), format = "%m.%d.%Y")

plot_ly(airquality_sept) %>%
add_trace(x = ~Date, y = ~Wind, type = 'bar', name = 'Wind',
        marker = list(color = '#C9EFF9')
       ) %>%  
add_trace(x = ~Date, y = ~Temp, type = 'scatter', mode = 'lines', name = 'Temperature', yaxis = 'y2',
        line = list(color = '#45171D')
) %>%

layout(title = 'New York Wind and Temperature Measurements for September 1973',
     xaxis = list(title = ""),
     yaxis = list(side = 'left', title = 'Wind in mph'),
     yaxis2 = list(side = 'right', overlaying = "y", title = 'Temperature in degrees F'))

【问题讨论】：

跟踪顺序始终是上一个跟踪之上的最后一个跟踪。
感谢您的回答，在提供的示例中，即使您更改了跟踪顺序，输出也没有改变，这是怎么回事？
您能否添加您的数据集或使用公共数据集以获得minimal reproducible example？
我使用的是公开的空气质量数据集。发布的代码是完全可重现的

标签： r plotly trace

【解决方案1】：

scatter 轨迹的 y 轴设置为 y2，yaxis2 在 layout 中为 overlaying y。

如果您想在后台使用scatter 轨迹，请反转y 轴分配或将yaxis 中的overlaying 设置为y2。

library(plotly)

airquality_sept <- airquality[which(airquality$Month == 9),]
airquality_sept$Date <- as.Date(paste(airquality_sept$Month, 
                                      airquality_sept$Day, 1973, sep = "."), format = "%m.%d.%Y")

plot_ly(airquality_sept) %>%
  add_trace(x = ~Date, y = ~Temp, type = 'scatter', mode = 'lines', name = 'Temperature', yaxis = 'y2',
            line = list(color = '#45171D')
  ) %>%
  add_trace(x = ~Date, y = ~Wind, type = 'bar', name = 'Wind',
            marker = list(color = '#C9EFF9', opacity = 0.5)
  ) %>%
  layout(title = 'New York Wind and Temperature Measurements for September 1973',
         xaxis = list(title = ""),
         yaxis = list(side = 'left', title = 'Wind in mph', overlaying = "y2"),
         yaxis2 = list(side = 'right', title = 'Temperature in degrees F'))

【讨论】：