How to make continuous legend in ggplot2?-CodePudding

The

CodePudding user response：

You could use the function geom_tile and scale_fill_gradientn to get a continuous scale instead of discrete scale legend like this:

library(ggplot2) library(sf) library(sp) library(raster) mybreaks <- seq(0, 500, 50) ggplot(df, aes(x, y, fill = value)) geom_tile() scale_fill_gradientn( colours = hcl.colors(length(mybreaks)-1, "Zissou1", rev = FALSE), breaks = mybreaks ) geom_sf(data=pg, fill="black", inherit.aes = FALSE) scale_x_continuous(expand = c(0, 0)) scale_y_continuous(expand = c(0, 0)) theme_classic() theme()

Output: