plotly R API，是否可能有饼图的子图？

Question

I'm hoping to subplot two pie charts with plotly's R API. However, it doesn't seem to work.

library(plotly) 
ds <- data.frame(labels = c("A", "B", "C"),
             val1 = c(10, 40, 60),
             val2 = c(20,40, 50))

 p1 <- plot_ly(ds, labels = labels, values = val1, type = "pie") 
 p2 <- plot_ly(ds, labels = labels, values = val2, type = "pie") 

 subplot(p1, p2, margin=0.05)

Thank you for your help.

Answer 1

I'll try and answer. For pie charts using plot_ly() the regular domain parameter used inside layout() doesn't work. You'll need to specify the domains inside the plot_ly() and add_trace() calls like so:

library(plotly)

df <- data.frame(labels1 = LETTERS[1:5], values1 = sample(100:200, size = 5),
                 labels2 = LETTERS[6:10], values2 = sample(100:200, size = 5))

plot_ly(df, labels = labels1, values = values1, type = "pie", 
        domain = list(x = c(0, 0.4)), showlegend = F) %>% 

  add_trace(labels = labels2, values = values2, type = "pie", 
            domain = list(x = c(0.6, 1)), showlegend = F) %>% 

  layout(title = "Pie chart - subplot")

Hope this helps...