Leaflet colours for polylines

Question

I would like to use a basic data.frame to get three polylines each of different colours

I am currently using the below code as an example.

require(le         


        

Answer 1

Here is a way to automate for each group in your dataset:

map <-  leaflet(df)
map <- addTiles(map)
for( group in levels(df$group)){
        map <- addPolylines(map, lng=~lon,lat=~lat,data=df[df$group==group,], color=~col)
        }
map