Black Lives Matter. Please consider donating to Black Girls Code today.
Learn how to use COVID-19 data in open source Dash apps. Register for the Sept 23rd webinar with IQT!

Is this a bug in dropdown events?

I have replicated the unexpected behavior using mtcars.
I want to be able to toggle between Numbers and Percents using a dropdown, but the “Number” from the previously visible plot of the second cateogry seems to get carried over when I toggle to “Percent.”

mtcars %>%
  mutate(vs = ifelse(vs == 0, "V", "S"), am = ifelse(am == 0, "auto", "manual")) %>%
  group_by(vs, am) %>%
  summarise(total = n(), num_big = sum(wt > 2.5),
            percent_big = (sum(wt > 2.5) / n())*100) %>%
  plot_ly(x = ~vs, color = ~am, colors = c("green", "blue")) %>%
  add_bars(y = ~num_big, name = "Number Big Cars", text = ~num_big) %>%
  add_bars(y = ~percent_big, name = "Percent Big Cars", text = ~percent_big, visible = F) %>%
  layout(title = "Big Cars per Category",
         showlegend = T,
         barmode = "group",
         yaxis = list(title = ""),
         updatemenus = list(
           list(
             buttons = list(
               list(method = "restyle",
                    args = list(
                      list("visible", list(TRUE, FALSE))),
                    label = "Number Big Cars"),
               list(method = "restyle",
                    args = list("visible", list(FALSE, TRUE)),
                    label = "Percent Big Cars")))
         ))


Surprisingly, the issue is somewhat fixed by adding an extra “FALSE, TRUE” in the middle of the second “visible” arg. But I still can’t toggle back to “Number.”

mtcars %>%
  mutate(vs = ifelse(vs == 0, "V", "S"), am = ifelse(am == 0, "auto", "manual")) %>%
  group_by(vs, am) %>%
  summarise(total = n(), num_big = sum(wt > 2.5),
            percent_big = (sum(wt > 2.5) / n())*100) %>%
  plot_ly(x = ~vs, color = ~am, colors = c("green", "blue")) %>%
  add_bars(y = ~num_big, name = "Number Big Cars", text = ~num_big) %>%
  add_bars(y = ~percent_big, name = "Percent Big Cars", text = ~percent_big, visible = F) %>%
  layout(title = "Big Cars per Category",
         showlegend = T,
         barmode = "group",
         yaxis = list(title = ""),
         updatemenus = list(
           list(
             buttons = list(
               list(method = "restyle",
                    args = list(
                      list("visible", list(TRUE, FALSE))),
                    label = "Number Big Cars"),
               list(method = "restyle",
                    args = list("visible", list(FALSE, FALSE, TRUE, TRUE)),
                    label = "Percent Big Cars")))
         ))

What’s going on? How can I toggle back to Number?
Any tips much appreciated.
Many thanks,
Emma

Hey @erudie,

try:

updatemenus = list(
           list(
             buttons = list(
               list(method = "restyle",
                    args = list("visible", list(TRUE, TRUE, FALSE, FALSE)),
                    label = "Number Big Cars"),
               list(method = "restyle",
                    args = list("visible", list(FALSE, FALSE, TRUE, TRUE)),
                    label = "Percent Big Cars")))
         ))

Ah! This works!
I had already tried that on my personal use-case but it didn’t work because I had a misplaced parenthesis. Oh well.
Thanks for the fast reply!!
-Emma