给定两个包含日期的数据框：
d1
# dates
# 2016-08-01
# 2016-08-02
# 2016-08-03
# 2016-08-04
d2
# dates
# 2016-08-02
# 2016-08-03
# 2016-08-04
# 2016-08-05
# 2016-08-06
如何创建第三个数据框，该数据框具有不常见的值？
d3
# dates
# 2016-08-01
# 2016-08-05
# 2016-08-06
数据：
df1 <- structure(list(dates = structure(c(17014, 17015, 17016, 17017 ),
class = "Date")), .Names = "dates", row.names = c(NA, -4L), class =
"data.frame")
df2 <- structure(list(dates = structure(c(17015, 17016, 17017, 17018,
17019), class = "Date")), .Names = "dates", row.names = c(NA, -5L), class
= "data.frame")
假设您有两个向量x和y，则不共享的元素是
c(x[!(x %in% y)], y[!(y %in% x)])
如果您使用数据框，只要您的dates列是“字符”或“日期”而不是“因数”，则可以
rbind(subset(df1, !(df1$dates %in% df2$dates)),
subset(df2, !(df2$dates %in% df1$dates)))
简单的矢量示例
x <- 1:5
y <- 3:8
c(x[!(x %in% y)], y[!(y %in% x)])
# [1] 1 2 6 7 8
矢量图“ Date”
x <- seq(from = as.Date("2016-01-01"), length = 5, by = 1)
y <- seq(from = as.Date("2016-01-03"), length = 5, by = 1)
c(x[!(x %in% y)], y[!(y %in% x)])
# [1] "2016-01-01" "2016-01-02" "2016-01-06" "2016-01-07"
您问题中的示例数据框
rbind(subset(df1, !(df1$dates %in% df2$dates)),
subset(df2, !(df2$dates %in% df1$dates)))
# dates
#1 2016-08-01
#4 2016-08-05
#5 2016-08-06
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