Color Gradients With ggplot
colors, ggplot2, r
Solution
There are two versions of these scale functions, one for `colour` and one for `fill`. You just needed to use the `fill` versions, i.e. `scale_fill_hue`, etc.
Problem
I have some geographic x,y,z data which I plot as follows ``` p<-ggplot(aes(x=x,y=y,fill=z),data=my_data) ``` I then apply a gradient ``` p<-p + scale_fill_gradient(low = "pink", high = "green") ``` And then tile and display the data ``` p<-p + geom_tile() p ``` This works and gives the following: One would think then, that I could replace the `scale_fill_gradient()` call with any number of other options such as ``` p<-p + scale_color_hue() p<-p + scale_colour_gradientn(colours=c("#E5F5F9","#99D8C9","#2CA25F")) p<-p + scale_colour_gradientn(colours = rainbow(7)) p<-p + scale_colour_brewer() ``` would work. But they don't, all I get is a gradient of blue. Any thoughts as to why this might be, and how I can generate lots of happy colours?