R Plotly-散点图：为单个点着色

Question

I am trying to specify the color of the points in my scatter plot. I would like to be able to specify a different color and alpha for each point.

The following snippet gives me the error "Error in grDevices::col2rgb(colors, alpha = alpha) : invalid color name 'rgba(105,100,30,.6)'"

I am quite stuck on this, any help is appreciated.

Thanks!

 library(plotly) library(ggplot2) library(igraph) tree <- make_tree(127,2) tree_layout <- layout_as_tree(tree) tree_layout_df <- as.data.frame(tree_layout) Xn <- tree_layout_df[,1] Yn <- tree_layout_df[,2] marker_color <- rep('rgba(105,100,30,.6)',127) reg_tree_plot <- plot_ly() %>% add_trace(x=~Xn, y=~Yn, type='scatter', mode='markers',color=~Xn, colors=marker_color) 

Answer 1

Following definition of marker_color is accepted in grDevices . I used runif and replicate to generate 127 (hopefully) different colours.

marker_color <- replicate(127, rgb(runif(1,0,1),runif(1,0,1),runif(1,0,1),runif(1,0,1)) )