有没有办法我可以手动控制各个范围的阈值?
问题描述：
我希望能够在choroplethr程序包上手动控制总体范围之间的阈值.
I would like to be able to manually control the thresholds between population ranges on choroplethr package.
library(choroplethr)
data(df_pop_county)
data(continental_us_states)
county_choropleth(df_pop_county,
state_zoom = continental_us_states)
答
您可以使用cut创建自定义间隔:
You can use cut to create the custom breaks:
# rename the original "value" column if you don't want to write over it
names(df_pop_county) <- c("region", "original_value")
# define the breaks you want
df_pop_county$value <- cut(df_pop_county[["original_value"]],
breaks = c(0, 1e4, 5e4, 1e5, 5e5, 1e6, 1e7))
# if you want custom labels to go along with those breaks, then provide
# the labels argument in cut:
# cut(df_pop_county[["original_value"]],
# breaks = c(0, 1e4, 5e4, 1e5, 5e5, 1e6, 1e7),
# labels =c( "0-9999","10000-49999", "50000-99999", "100000-499999", "500000-999999", "1000000-10000000"))