ile doldurun voronoi çokgenleri bir değişkene dayalı renklerle doldurmak istiyorum (durumumda z).voronoi çokgenleri ggplot
library(rgdal)
library(deldir)
library(dplyr)
library(ggplot2)
library(UScensus2010)
x<-c(0,55,105,165,270,65,130,155,155,225,250,295,
30,100,110,135,160,190,230,300,30,70,105,170,
210,245,300,0,85,175,300,15,60,90,90,140,210,
260,270,295,5,55,55,90,100,140,190,255,285,270)
y<-c(305,310,305,310,310,260,255,265,285,280,250,
260,210,240,225,225,225,230,210,215,160,190,
190,175,160,160,170,120,135,115,110,85,90,90,
55,55,90,85,50,50,25,30,5,35,15,0,40,20,5,150)
z<-c(870,793,755,690,800,800,730,728,710,780,804,
855,813,762,765,740,765,760,790,820,855,812,
773,812,827,805,840,890,820,873,875,873,865,
841,862,908,855,850,882,910,940,915,890,880,
870,880,960,890,860,830)
dati<-data.frame(x,y,z)
vor_pts <- SpatialPointsDataFrame(cbind(dati$x,dati$y),dati, match.ID=TRUE)
SPointsDF_to_voronoi_SPolysDF <- function(sp) {
# tile.list extracts the polygon data from the deldir computation
vor_desc <- tile.list(deldir([email protected][,1], [email protected][,2]))
lapply(1:(length(vor_desc)), function(i) {
# tile.list gets us the points for the polygons but we
# still have to close them, hence the need for the rbind
tmp <- cbind(vor_desc[[i]]$x, vor_desc[[i]]$y)
tmp <- rbind(tmp, tmp[1,])
# now we can make the Polygon(s)
Polygons(list(Polygon(tmp)), ID=i)
}) -> vor_polygons
# hopefully the caller passed in good metadata!
sp_dat <- [email protected]
# this way the IDs _should_ match up w/the data & voronoi polys
rownames(sp_dat) <- sapply(slot(SpatialPolygons(vor_polygons),
'polygons'),
slot, 'ID')
SpatialPolygonsDataFrame(SpatialPolygons(vor_polygons),
data=sp_dat)
}
vor <- SPointsDF_to_voronoi_SPolysDF(vor_pts)
vor_df <- fortify(vor)
ggplot() +
geom_point(data = dati, aes(x, y), shape=21,
color = "white", fill = "steel blue") +
geom_map(data = vor_df, map = vor_df, aes(x = long, y = lat, map_id = id),
color = "#a5a5a5", fill = "#FFFFFF00", size = 0.25)
Şimdi bu görüntü var:
Her poligon değişken z değerine dayalı bir renk skalası eşlenmesi gerektiğini istiyorum nasıl can ... İşte kod ben bunu yaparım?? Teşekkürler!!!
related: http://stackoverflow.com/questions/5608381/plotting-and-coloring-data-on-irregular-grid (ama asla tatmin edici bir cevap bulamadım: – baptiste
ayrıca bkz: http://stackoverflow.com/a/24312134/471093 – baptiste
ve [gazetools] (http://finzi.psych.upenn.edu/library/gazetools/ html/geom_voronoi.html) paketinin bunun için bir geom olduğu anlaşılıyor – baptiste