Alpha from stat_summary_2d ignored

ggplotly does not carry over the alpha level for stat_summary_2d. Seems like it may be similar to the same issue that occurred with points in a previous version.

This isn't as obvious in the reproducible example, but for regions where the map isn't just water, and the locations are more dense, having the alpha allows for a visible basemap.

fiji <-  get_googlemap("Fiji", zoom = 5, maptype = "roadmap", color = "bw", size = c(640, 480), scale = 2)

ggplotly({
  ggmap(fiji, extent = "device") + 
  stat_summary_2d(data = quakes, aes(x = long, y = lat, z = mag), alpha = .55 , fun = mean, bins = 100) +
  scale_fill_gradient(name = "Fullness", low = "green", high = "red")
  }, tooltip = "fill"
)

ggplot2 output:

plotly output:

Commencez par l’exemple R reproductible dans l’issue et comparez les sorties de ggplot2 et plotly, en vous concentrant sur stat_summary_2d et son paramètre alpha. Suivez le chemin de conversion de cette couche et vérifiez le résultat en confirmant que la sortie de plotly préserve la transparence demandée sur le fond de carte.