[英]facet_wrap in ggplot for sf
library(raster)
library(ggplot2)
library(sf)
temp.shp <- getData('GADM', country='FRA', level = 2)
temp.shp <- st_as_sf(temp.shp)
dat <- data.frame(CC_2 = rep(temp.shp$CC_2, times = 3),
value = c(sample(1:100, length(temp.shp$CC_2), replace = T),
sample(0.1:1, length(temp.shp$CC_2), replace = T),
sample(-1:-100, length(temp.shp$CC_2), replace = T)),
client = rep(c('a','b','c'), each = length(temp.shp$CC_2)))
dat.shp <- merge(temp.shp, dat, by = 'CC_2')
ggplot() +
geom_sf(data = dat.shp, aes(fill = value), colour = NA) +
scale_fill_viridis_c(option = 'C') +
facet_wrap(~client)
我希望每个面板都有自己的图例,因为图例范围不同
ggplot() +
geom_sf(data = dat.shp, aes(fill = value), colour = NA) +
scale_fill_viridis_c(option = 'C') +
facet_wrap(~client, scales = 'free')
# Error: coord_sf doesn't support free scales
获得具有单个图例的“方面”图的一种解决方案是创建三个单独的图并使用gridExtra
包中的grid.arrange
组合它们:
pA <- ggplot() +
geom_sf(data = subset(dat.shp, client == "a"), aes(fill = value), colour = NA) +
scale_fill_viridis_c(option = 'C')+
ggtitle(label = "client a")+
theme(plot.title = element_text(hjust = 0.5))
pB <- ggplot() +
geom_sf(data = subset(dat.shp, client == "b"), aes(fill = value), colour = NA) +
scale_fill_viridis_c(option = 'C')+
ggtitle(label = "client b")+
theme(plot.title = element_text(hjust = 0.5))
pC <- ggplot() +
geom_sf(data = subset(dat.shp, client == "c"), aes(fill = value), colour = NA) +
scale_fill_viridis_c(option = 'C')+
ggtitle(label = "client c")+
theme(plot.title = element_text(hjust = 0.5))
library(gridExtra)
grid.arrange(pA,pB,pC, nrow = 1)
您也可以考虑使用tmap
包。 这是一个可能的解决方案:
library(raster)
library(ggplot2)
library(sf)
library(tmap)
temp.shp <- getData('GADM', country='FRA', level = 2)
temp.shp <- st_as_sf(temp.shp)
dat <- data.frame(CC_2 = rep(temp.shp$CC_2, times = 3),
value = c(sample(1:100, length(temp.shp$CC_2), replace = T),
sample(0.1:1, length(temp.shp$CC_2), replace = T),
sample(-1:-100, length(temp.shp$CC_2), replace = T)),
client = rep(c('a','b','c'), each = length(temp.shp$CC_2)))
dat.shp <- merge(temp.shp, dat, by = 'CC_2')
tm_shape(dat.shp) +
tm_polygons("value", palette = "viridis") +
tm_layout(legend.position = c("left", "bottom")) +
tm_facets("client", free.scales = TRUE)
由reprex 包(v0.3.0) 于 2020 年 3 月 12 日创建
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