R 使用Lappy更改具有不同列名的数据帧列表的列名
我有三个不同列名的数据帧:R 使用Lappy更改具有不同列名的数据帧列表的列名,r,dataframe,lapply,R,Dataframe,Lapply,我有三个不同列名的数据帧: df1 <- data.frame(A = 1:10, B = 10:19) df2 <- data.frame(D = 20:29, E = 30:39) df3 <- data.frame(G = 40:49, H = 50:59) df1您可以使用from和to的信息以及lapply创建数据帧,使用setNames匹配和替换列名: lookup_names <- data.frame(from = c("A", &q
df1 <- data.frame(A = 1:10, B = 10:19)
df2 <- data.frame(D = 20:29, E = 30:39)
df3 <- data.frame(G = 40:49, H = 50:59)
df1您可以使用from
和to
的信息以及lapply
创建数据帧,使用setNames
匹配和替换列名:
lookup_names <- data.frame(from = c("A", "B", "D", "E", "G", "H"),
to = c("this", "that", "he", "she", "him", "her"))
lookup_names
# from to
#1 A this
#2 B that
#3 D he
#4 E she
#5 G him
#6 H her
lapply(my_list, function(x)
setNames(x, lookup_names$to[match(names(x), lookup_names$from)]))
#[[1]]
# this that
#1 1 10
#2 2 11
#3 3 12
#4 4 13
#...
#...
#[[2]]
# he she
#1 20 30
#2 21 31
#3 22 32
#4 23 33
#5 24 34
#....
lookup\u名称那么是否将大小为6的向量存储在某个位置,以附加到现有的列名上?如何映射要追加的旧名称和新名称?它是基于列的位置还是名称?@RonakShah我希望能够根据名称映射更改,类似于mapvalues
的工作方式:mapvalues(df$column,from=c(“A”、“B”、“D”、“E”、“G”、“H”),to=c(“A2”、“B2”、“D2”、“E2”、“G2”、“H2”)
。但当然,我需要使用lappy
来更改列名,这与这里的示例不同,这里的值只是在一个列中更改。它们必须按名称映射,并且也能够这样做:mapvalues(df$column,from=c(“a”、“B”、“D”、“E”、“G”、“H”)到=c(“this”、“that”、“he”、“she”,“他”,“她”))
lookup_names <- data.frame(from = c("A", "B", "D", "E", "G", "H"),
to = c("this", "that", "he", "she", "him", "her"))
lookup_names
# from to
#1 A this
#2 B that
#3 D he
#4 E she
#5 G him
#6 H her
lapply(my_list, function(x)
setNames(x, lookup_names$to[match(names(x), lookup_names$from)]))
#[[1]]
# this that
#1 1 10
#2 2 11
#3 3 12
#4 4 13
#...
#...
#[[2]]
# he she
#1 20 30
#2 21 31
#3 22 32
#4 23 33
#5 24 34
#....