census - 美国州际移民流动

Question

我试图捕捉州到州迁移的流动，但似乎只能获得县数据。

如果有人知道我如何从美国人口普查中获得美国各州移民流动矩阵，我将不胜感激！

library(censusapi)
counties <- NULLfor (f in fips) {
stateget <- paste("state:", f, sep="")
temp <- getCensus(name = "acs/flows",
  vintage = 2015,
  vars = c("MOVEDIN", "MOVEDOUT", "FULL1_NAME", "FULL2_NAME", "GEOID2"),
  region = "county:*",
  regionin = stateget)
counties <- rbind(counties, temp)

} 头（县）