Format hovertext or hoverinfo information in plotly

Question

How can I format the hoverinfo() or hovertext() of my grouped plotly barchart in order to display the data as the following:

Animals:Giraffe
SF_ZOO:20

Animals <- c("giraffes", "orangutans", "monkeys")
SF_Zoo <- c(20, 14, 23)
LA_Zoo <- c(12, 18, 29)
data <- data.frame(Animals, SF_Zoo, LA_Zoo)
library(plotly)
fig <- plot_ly(data, x = ~Animals, y = ~SF_Zoo, type = 'bar', name = 'SF_ZOO',marker=list(color="#556361"),
               hoverinfo = paste(Animals,SF_Zoo))
fig <- fig %>% add_trace(y = ~LA_Zoo, name = 'LA_ZOO',marker=list(color="#A72608"),
                         hoverinfo = paste(Animals,SF_Zoo))

fig <- fig %>% layout(yaxis = list(title = 'Count'), barmode = 'group')

fig

Alternatively I could use ggplotly() solution.

Answer 1

You can use hovertemplate:

library(plotly)

Animals <- c("giraffes", "orangutans", "monkeys")
SF_Zoo <- c(20, 14, 23)
LA_Zoo <- c(12, 18, 29)
data <- data.frame(Animals, SF_Zoo, LA_Zoo)
library(plotly)
fig <- plot_ly(
  data, x = ~Animals, y = ~SF_Zoo, type = 'bar', name = 'SF_ZOO', 
  marker=list(color="#556361"), 
  hovertemplate = paste("Animals: %{x}" , "<br>SF_Zoo: %{y}", "<extra></extra>")
)
fig <- fig %>% add_trace(
  y = ~LA_Zoo, name = 'LA_ZOO',marker=list(color="#A72608"),
  hovertemplate = paste("Animals: %{x}" , "<br>LA_Zoo: %{y}", "<extra></extra>")
)

fig <- fig %>% layout(yaxis = list(title = 'Count'), barmode = 'group')

fig