Scatter points at wrong coordinates when combining multicategory axis and colour

Hi,

When combining a multicategory axis and colour coding in a scatter plot, the mapping of the points seem to go wrong.
In p2 in the example below, the points appear at coordinates that are not in the data.
The problem can be resolved by first ordering the data (p4).

library(plotly)
d <- data.frame(
  l1 = letters[11:15],
  l2 = c('a', 'a', 'a', 'a', 'b'),
  y = 1:10,
  col = LETTERS[11:15],
  stringsAsFactors = F
)
p1 <- plot_ly(
  data = d,
  x = list(~l2, ~l1),
  y = ~y,
  # color = ~col,
  type = 'scatter',
  mode = 'markers'
)
p2 <- plot_ly(
  data = d,
  x = list(~l2, ~l1),
  y = ~y,
  color = ~col,
  type = 'scatter',
  mode = 'markers'
)
d <- d[order(d$l1), ]
p3 <- plot_ly(
  data = d,
  x = list(~l2, ~l1),
  y = ~y,
  # color = ~col,
  type = 'scatter',
  mode = 'markers'
)
p4 <- plot_ly(
  data = d,
  x = list(~l2, ~l1),
  y = ~y,
  color = ~col,
  type = 'scatter',
  mode = 'markers'
)

subplot(p1, p2, p3, p4, nrows = 2, margin = .07) %>% 
  layout(annotations = list(
    list(x = 0.1 , y = 1.05, text = "unordered/uncolored", showarrow = F, xref='paper', yref='paper'),
    list(x = 0.9 , y = 1.05, text = "unordered/colored", showarrow = F, xref='paper', yref='paper'),
    list(x = 0.1 , y = .45, text = "ordered/uncolored", showarrow = F, xref='paper', yref='paper'),
    list(x = 0.9 , y = .45, text = "ordered/colored", showarrow = F, xref='paper', yref='paper')
  )
)

Commencez par exécuter l’exemple reproductible en R fourni et comparez le nuage de points non ordonné/coloré avec les autres panneaux. Suivez la gestion des nuages de points pour les axes à catégories multiples combinés avec la couleur ; la tâche est terminée lorsque les points restent aux coordonnées des données d’entrée sans nécessiter de tri préalable.