add colorFactor palette to mapview object

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The aim is to provide fixed colors to factor values. I struggle applying a colorFactor scale to a mapview object. However, the palette does not seem to match zcol.

I tried the following, similar to a leaflet map.

library(mapview)

colors <- colorFactor(palette = c("Red", "Green", "Blue"),
                      levels = c("Oberfranken","Mittelfranken", "Unterfranken"))

mapview(franconia, zcol = "district",col.regions=colors)

Mapview Output

I get the following error-message:

1: In col.regions(nregions) :   Some values were outside the color
scale and will be treated as NA

Any help on that?

the following would work on leaflet, but does not make use of mapview.

franconia %>% leaflet() %>% addTiles() %>% addPolygons(fillColor = ~colors(district))

leaflet output

mapview leaflet r
1 Answers

mapview::mapviewColors seems to do the trick:

library(mapview)

colors <- mapviewColors(x=franconia,
                        zcol = "district", 
                        colors = c("Red", "Green", "Blue"),
                        at = c("Oberfranken","Mittelfranken", "Unterfranken"))

mapview(franconia, zcol = "district",col.regions = colors)

enter image description here

user_185030180
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