I'm trying to do a map with ggplot and geom_scatterpie function but I'm keep receiving this error: "Error: Discrete value supplied to continuous scale"
the code is the following:
ggplot() +
geom_tile(data = my_raster, aes(x = x, y = y, fill = values)) +
scale_fill_gradientn(colours = c("white", "white", "white", "white", "grey", "white", "white"), na.value = "white", guide="none") +
geom_sf(data = europe_cropped, size = 0.1, color = "black", fill = "white", alpha = 0.4) +
geom_scatterpie(aes(x = long, y = lat, r = 2),
cols = colnames(my_table[2:5], color = "black",
data = my_table) +
ylab("") +
xlab("") +
coord_sf() +
theme_few()
I've tried to run it without the geom_tile and scale_fill lines and it works but I need that raster as base of the map. What could be the problem the gives the error?
edit:
head(my_raster)
| x | y | focal_max |
|---|---|---|
| -9.979089 | 64.98143 | 200 |
| -9.965076 | 64.98143 | 200 |
| -9.951063 | 64.98143 | 200 |
| -9.937050 | 64.98143 | 200 |
| -9.923037 | 64.98143 | 200 |
| -9.909024 | 64.98143 | 200 |
head(my_table)
| site | group1 | group2 | group3 | group4 | lat | long |
|---|---|---|---|---|---|---|
| site1 | 0.317 | 0 | 0.0448 | 0.280 | 47.7 | 5.08 |
| site2 | 0.370 | 0 | 0.0359 | 0.319 | 47.8 | 5.07 |
| site3 | 0.344 | 0 | 0.0269 | 0.233 | 47.8 | 5.12 |
| site4 | 0.317 | 0 | 0.00896 | 0.342 | 47.8 | 5.06 |
| site5 | 0.291 | 0 | 0.0538 | 0.373 | 47.8 | 5.04 |
| site6 | 0.476 | 0 | 0.0179 | 0.490 | 47.7 | 5.12 |
