从图中删除连续的图例

Question

I have a basic scatterplot that I've made in plotly (in R). I'm using a continuous input to color the data points which plotly converts into a gradient. However, the removelegend option doesn't remove a continuous legend the way it removes a discrete legend. Consider the example below.

data = mtcars
data$vs = as.character(data$vs)

plotly::plot_ly(
  data = data,
  x = ~disp,
  y = ~mpg,
  color = ~vs,
  mode = "markers",
  type = "scatter"
) %>% 
  layout(showlegend = FALSE)

plotly::plot_ly(
  data = data,
  x = ~disp,
  y = ~mpg,
  color = ~hp,
  mode = "markers",
  type = "scatter"
) %>% 
  layout(showlegend = FALSE)

Is there a way to remove the continuous legend?

Answer 1

The issue arises because in the continuous case plotly doesn't call it a legend, it's a color bar. The easiest way to remove it is to pipe in hide_colorbar()

plotly::plot_ly(
  data = data,
  x = ~disp,
  y = ~mpg,
  color = ~hp,
  mode = "markers",
  type = "scatter"
) %>% 
  hide_colorbar()