how to disable the second hoverinfo in R plotly?

Question

I am using plotly to decompose all the factor of an evolution, I want to graph a bar diagram and then to add the "sum" as a marker, this way :

libelle <- c("A","B","C","A","B","C")
value <- c(1500000,987000,1540000,-600000,-627000,-1240000)
type <- c("gain","gain","gain","loss","loss","loss")
data <- data.frame(libelle,value,annee)
plot_ly(data=data,x=value,y=libelle,group=type,type="bar",orientation="h") %>% 
  group_by(libelle) %>% summarise(sum = sum(value)) %>%
  add_trace(x=sum,y=libelle,mode="markers",marker=list(color="black"),name="total")

All is fine with this graph, except for the hoverinfo : I would like to keep the hoverinfo of the first trace (when I over anywhere on a libelle, I get the info from both loss and gain), and with the second trace, it is replaced by another. I tried to put hoverinfo="none" in the add_trace, with no result.

any idea ?

Answer 1

You should be able to state which level you wanted the hover to appear by adding hoverinfo separately.

To show hover info for trace and not the bar plot:

plot_ly(data=data,x=value,y=libelle,group=type,type="bar",orientation="h", hoverinfo="none") %>% 
  group_by(libelle) %>% summarise(sum = sum(value)) %>%
  add_trace(x=sum,y=libelle,mode="markers",marker=list(color="black"),name="total", hoverinfo="all")

To show hover info for bar and not the trace markers:

plot_ly(data=data,x=value,y=libelle,group=type,type="bar",orientation="h", hoverinfo="all") %>% 
  group_by(libelle) %>% summarise(sum = sum(value)) %>%
  add_trace(x=sum,y=libelle,mode="markers",marker=list(color="black"),name="total", hoverinfo="none")