正如标题所述,我正在尝试使用gsub,其中我使用向量作为“模式”和“替换”。目前,我有一个代码如下:
names(x1) <- gsub("2110027599", "Inv1", names(x1)) #x1 is a data frame
names(x1) <- gsub("2110025622", "Inv2", names(x1))
names(x1) <- gsub("2110028045", "Inv3", names(x1))
names(x1) <- gsub("2110034716", "Inv4", names(x1))
names(x1) <- gsub("2110069349", "Inv5", names(x1))
names(x1) <- gsub("2110023264", "Inv6", names(x1))
我希望做的是这样的事情:
a <- c("2110027599","2110025622","2110028045","2110034716", "2110069349", "2110023264")
b <- c("Inv1","Inv2","Inv3","Inv4","Inv5","Inv6")
names(x1) <- gsub(a,b,names(x1))
我猜测某个地方有一个可以做到这一点的应用功能,但我不太确定使用哪一个!
编辑:名称(x1)看起来像这样(还有更多列,但我将它们排除在外):
> names(x1)
[1] "2110023264A.Ms.Amp" "2110023264A.Ms.Vol" "2110023264A.Ms.Watt" "2110023264A1.Ms.Amp"
[5] "2110023264A2.Ms.Amp" "2110023264A3.Ms.Amp" "2110023264A4.Ms.Amp" "2110023264A5.Ms.Amp"
[9] "2110023264B.Ms.Amp" "2110023264B.Ms.Vol" "2110023264B.Ms.Watt" "2110023264B1.Ms.Amp"
[13] "2110023264Error" "2110023264E-Total" "2110023264GridMs.Hz" "2110023264GridMs.PhV.phsA"
[17] "2110023264GridMs.PhV.phsB" "2110023264GridMs.PhV.phsC" "2110023264GridMs.TotPFPrc" "2110023264Inv.TmpLimStt"
[21] "2110023264InvCtl.Stt" "2110023264Mode" "2110023264Mt.TotOpTmh" "2110023264Mt.TotTmh"
[25] "2110023264Op.EvtCntUsr" "2110023264Op.EvtNo" "2110023264Op.GriSwStt" "2110023264Op.TmsRmg"
[29] "2110023264Pac" "2110023264PlntCtl.Stt" "2110023264Serial Number" "2110025622A.Ms.Amp"
[33] "2110025622A.Ms.Vol" "2110025622A.Ms.Watt" "2110025622A1.Ms.Amp" "2110025622A2.Ms.Amp"
[37] "2110025622A3.Ms.Amp" "2110025622A4.Ms.Amp" "2110025622A5.Ms.Amp" "2110025622B.Ms.Amp"
[41] "2110025622B.Ms.Vol" "2110025622B.Ms.Watt" "2110025622B1.Ms.Amp" "2110025622Error"
[45] "2110025622E-Total" "2110025622GridMs.Hz" "2110025622GridMs.PhV.phsA" "2110025622GridMs.PhV.phsB"
我希望得到的是:
> names(x1)
[1] "Inv6A.Ms.Amp" "Inv6A.Ms.Vol" "Inv6A.Ms.Watt" "Inv6A1.Ms.Amp" "Inv6A2.Ms.Amp"
[6] "Inv6A3.Ms.Amp" "Inv6A4.Ms.Amp" "Inv6A5.Ms.Amp" "Inv6B.Ms.Amp" "Inv6B.Ms.Vol"
[11] "Inv6B.Ms.Watt" "Inv6B1.Ms.Amp" "Inv6Error" "Inv6E-Total" "Inv6GridMs.Hz"
[16] "Inv6GridMs.PhV.phsA" "Inv6GridMs.PhV.phsB" "Inv6GridMs.PhV.phsC" "Inv6GridMs.TotPFPrc" "Inv6Inv.TmpLimStt"
[21] "Inv6InvCtl.Stt" "Inv6Mode" "Inv6Mt.TotOpTmh" "Inv6Mt.TotTmh" "Inv6Op.EvtCntUsr"
[26] "Inv6Op.EvtNo" "Inv6Op.GriSwStt" "Inv6Op.TmsRmg" "Inv6Pac" "Inv6PlntCtl.Stt"
[31] "Inv6Serial Number" "Inv2A.Ms.Amp" "Inv2A.Ms.Vol" "Inv2A.Ms.Watt" "Inv2A1.Ms.Amp"
[36] "Inv2A2.Ms.Amp" "Inv2A3.Ms.Amp" "Inv2A4.Ms.Amp" "Inv2A5.Ms.Amp" "Inv2B.Ms.Amp"
[41] "Inv2B.Ms.Vol" "Inv2B.Ms.Watt" "Inv2B1.Ms.Amp" "Inv2Error" "Inv2E-Total"
[46] "Inv2GridMs.Hz" "Inv2GridMs.PhV.phsA" "Inv2GridMs.PhV.phsB"
答案 0 :(得分:24)
已有很多解决方案,这里还有一个:
qdap包:
library(qdap)
names(x1) <- mgsub(a,b,names(x1))
答案 1 :(得分:16)
来自str_replace_all
的字符串文档,&#34;如果要将多个模式和替换应用于同一个字符串,请将命名的版本传递给模式。&#34; < / p>
因此使用上面的a,b和名称(x1)
library(stringr)
names(b) <- a
str_replace_all(names(x1), b)
答案 2 :(得分:9)
如果我们可以做出另一个假设,以下内容应该有效。这次的假设是你真的有兴趣替换names(x1)
中每个值的前10个字符。
在这里,我将names(x1)
存储为名为“X1”的字符向量。该解决方案主要使用substr
将X1中的值分为2个部分,match
以找出正确的替换选项,并paste
将所有内容重新组合在一起。
a <- c("2110027599", "2110025622", "2110028045",
"2110034716", "2110069349", "2110023264")
b <- c("Inv1","Inv2","Inv3","Inv4","Inv5","Inv6")
X1pre <- substr(X1, 1, 10)
X1post <- substr(X1, 11, max(nchar(X1)))
paste0(b[match(X1pre, a)], X1post)
# [1] "Inv6A.Ms.Amp" "Inv6A.Ms.Vol" "Inv6A.Ms.Watt"
# [4] "Inv6A1.Ms.Amp" "Inv6A2.Ms.Amp" "Inv6A3.Ms.Amp"
# [7] "Inv6A4.Ms.Amp" "Inv6A5.Ms.Amp" "Inv6B.Ms.Amp"
# [10] "Inv6B.Ms.Vol" "Inv6B.Ms.Watt" "Inv6B1.Ms.Amp"
# [13] "Inv6Error" "Inv6E-Total" "Inv6GridMs.Hz"
# [16] "Inv6GridMs.PhV.phsA" "Inv6GridMs.PhV.phsB" "Inv6GridMs.PhV.phsC"
# [19] "Inv6GridMs.TotPFPrc" "Inv6Inv.TmpLimStt" "Inv6InvCtl.Stt"
# [22] "Inv6Mode" "Inv6Mt.TotOpTmh" "Inv6Mt.TotTmh"
# [25] "Inv6Op.EvtCntUsr" "Inv6Op.EvtNo" "Inv6Op.GriSwStt"
# [28] "Inv6Op.TmsRmg" "Inv6Pac" "Inv6PlntCtl.Stt"
# [31] "Inv6Serial Number" "Inv2A.Ms.Amp" "Inv2A.Ms.Vol"
# [34] "Inv2A.Ms.Watt" "Inv2A1.Ms.Amp" "Inv2A2.Ms.Amp"
# [37] "Inv2A3.Ms.Amp" "Inv2A4.Ms.Amp" "Inv2A5.Ms.Amp"
# [40] "Inv2B.Ms.Amp" "Inv2B.Ms.Vol" "Inv2B.Ms.Watt"
# [43] "Inv2B1.Ms.Amp" "Inv2Error" "Inv2E-Total"
# [46] "Inv2GridMs.Hz" "Inv2GridMs.PhV.phsA" "Inv2GridMs.PhV.phsB"
如果我们可以假设names(x1)
与模式和替换的顺序相同,并且它基本上是一对一替换,那么您可能只能使用sapply
以下是该特定情况的一个示例:
想象一下“names(x)”看起来像这样:
X1 <- paste0("A2", a, sequence(length(a)))
X1
# [1] "A221100275991" "A221100256222" "A221100280453"
# [4] "A221100347164" "A221100693495" "A221100232646"
这是我们的pattern
和replacement
向量:
a <- c("2110027599", "2110025622", "2110028045",
"2110034716", "2110069349", "2110023264")
b <- c("Inv1","Inv2","Inv3","Inv4","Inv5","Inv6")
如果这些假设有效,我们可以使用sapply
。
sapply(seq_along(a), function(x) gsub(a[x], b[x], X1[x]))
# [1] "A2Inv11" "A2Inv22" "A2Inv33" "A2Inv44" "A2Inv55" "A2Inv66"
答案 3 :(得分:2)
不知何故,names<-
和match
似乎更适合......
names( x1 ) <- b[ match( names( x1 ) , a ) ]
但我假设向量a
的元素是names
的实际data.frame
。
如果a
确实是在names
x1
grepl
中找到的模式,那么此names<-
方法会new <- sapply( a , grepl , x = names( x1 ) )
names( x1 ) <- b[ apply( new , 1 , which.max ) ]
可能有用......
{{1}}
答案 4 :(得分:1)
尝试mapply
。
names(x1) <- mapply(gsub, a, b, names(x1), USE.NAMES = FALSE)
或者更容易str_replace
来自stringr
。
library(stringr)
names(x1) <- str_replace(names(x1), a, b)
答案 5 :(得分:0)
我需要做类似的事情,但必须使用基数R。只要您的向量长度相同,我认为这就会起作用
for (i in seq_along(a)){
names(x1) <- gsub(a[i], b[i], names(x1))
}