Feature Request: Size Legend Bubble Chart

[mviertel]

I am not sure whether this is the right forum to address the issue. Nevertheless, after quite some searching, I was unsuccessful to figure out a way to add a legend to a bubble chart, that reflects information on the bubble size in a chart like the one below.

library(plotly)
d <- diamonds[sample(nrow(diamonds), 1000), ]
plot_ly(d, x = carat, y = price, size = carat, mode = "markers")

I am looking for something a similar chart legend like in the picture attached.

If I am off topic here, please don´t hesitate to close the issue - a hint to a solution would be highly appreciated, though.

Best
Michael

image source: https://visage.co/data-visualization-101-bubble-charts/

[mviertel]

Can I expect anything here?

[cpsievert]

Great idea! plotly.js won't support this at the moment, but it should soon!

[mviertel]

Not sure how you are planning to implement this, but it would for sure be sweet if this feature were available for scatter plots on maps, too.

[ibhalin]

I'm bumping this because you just can't read bubble charts without bubble size in the legend !

[zhangguy]

Please consider adding a function to plot a second legend for the marker size, as what is done in this R package: https://rpkgs.datanovia.com/ggpubr/reference/ggballoonplot.html

Thanks