12.5 geom_polygon

See also the hexbin templates in pubtheme.

Code

## Data frame with coordinates of the corners of polygons
## along with which polygon each x,y cooresponds to, 
## and a probability to be used to fill the polygon
df = data.frame(    x=c(1,2,2,1, 3,4,4),
                    y=c(1,1,2,2, 1,1,2), 
                group=c(1,1,1,1, 2,2,2), 
                    p=c(.1,.1,.1,.1, .2, .2, .2))
ggplot(df, 
       aes(x, y, 
           group=group, ## says which shape each x,y belong to 
           fill=p))+    ## says to color by p
  geom_polygon()