Color code a scatter plot by group with a gradient
I have XY data which I'd like to graph using a scatter plot , with R 's plotly package. set.seed(1) df <- data.frame(x=c(rnorm(30,1,1),rnorm(30,5,1),rnorm(30,9,1)), y=c(rnorm(30,1,1),rnorm(30,5,1),rnorm(30,9,1)), group=c(rep("A",30),rep("B",30),rep("C",30)),score=runif(90,0,1)) Each point is assigned to one of three groups ( df$group ) and has a score in the [0,1] range. I'm looking for a way to graph the data such that each group is colored with a different color but the shade of that color (or intensity) reflects the score. So I thought this would work: library(dplyr) library(plotly) plot_ly