我有一种情况,我有两个不同时间段的不同数据集.虽然许多列是相同的,但有些不是.这些"不同"列是应保留的辅助数据.
我想组合这两个数据集,留下NA不存在的值.请注意,这两个表没有任何外键,不应该连接,只是堆叠在一起.
例:
data.a <- structure(list(lat = c(50L, -30L, -33L), lon = c(-40L, -30L,
-50L), mag = c(3.5, 1.1, 2.3)), .Names = c("lat", "lon", "mag"
), class = "data.frame", row.names = c(NA, -3L))
data.b <- structure(list(lat = c(44L, -30L, -33L), lon = c(-40L, -30L,
-55L), elev = c(1050, 2.4, 2.3)), .Names = c("lat", "lon", "elev"
), class = "data.frame", row.names = c(NA, -3L))
data.a
lat lon mag
50 -40 3.5
-30 -30 1.1
-33 -50 2.3
data.b
lat …