R用图表颜色参数指定自定义图例名称

Question

I am trying to plot using color coding on a value, and changing default legend names. Can't seem to get it to work.

This code plots what I mainly want:

df <- data.frame(x = 1:10, y = 1:10)
plot_ly(df, x = x, y = y, color = y > 5, mode = 'markers')

Now, I am trying to change the default legend names so they are more explanatory:

plot_ly(df, x = x, y = y, color = y > 5, mode = 'markers', name = c('Y <= 5', 'y > 5'))

Does not do anything, even though plotly documentation says name is the right way to change the legend name.

I just want the legend names to be more descriptive than simple true and false as they are shown in the plot.

Answer 1

Color by third variable, here added with dplyr .

df <- data.frame(x = 1:10, y = 1:10)

df %>% 
  dplyr::mutate(col = ifelse(y >= 5, ">= 5", "< 5")) %>% 
  plot_ly(x = ~x, color = ~col, mode = 'markers') %>% 
  add_markers(y = ~y)