重命名包含R中符号的因子级别

Question

我有一个名为prueba的数据框，其中我有一个因子变量ccaa，其中包含以下级别：

x <- c("","Andalucia","Aragon","Asturias","Balears","Canarias","Cantabria",
       "Castilla Leon","Castilla Mancha","Catalu<f1>a","Ceuta","Comunitat Valenciana",
       "Extremadura","Galicia","Madrid","Melilla","Murcia","Navarra","Pa<ed>s Vasco",
       "Rioja")

prueba <- data.frame(cca = x)
levels(prueba$cca)

#  [1] ""                     "Andalucia"            "Aragon"               "Asturias"            
#  [5] "Balears"              "Canarias"             "Cantabria"            "Castilla Leon"       
#  [9] "Castilla Mancha"      "Catalu<f1>a"          "Ceuta"                "Comunitat Valenciana"
# [13] "Extremadura"          "Galicia"              "Madrid"               "Melilla"             
# [17] "Murcia"               "Navarra"              "Pa<ed>s Vasco"        "Rioja"   

我试图重命名包含"Catalu<f1>a"和"Pa<ed>s Vasco"等符号的级别。我尝试了几个不成功的选项：

选项1：使用函数plyr打包revalue

 prueba$ccaa = revalue(prueba$ccaa,c( "Pa<ed>s Vasco" = "Basque Country", "Catalu<f1>a" = "Catalonia"))

它会产生以下错误：

The following `from` values were not present in `x`: Pa<ed>s Vasco, Catalu<f1>a

选项2：

levels(prueba$cca)[levels(prueba$cca)=="Catalu<f1>a"] <- "Catalonia"
levels(prueba$cca)[levels(prueba$cca)=="Pa<ed>s Vasco"] <- "Basque Country"

这样可以正常工作，但不会使用新标签重命名级别

levels(prueba$ccaa)
#  [1] ""                     "Andalucia"            "Aragon"              
#  [4] "Asturias"             "Balears"              "Canarias"            
#  [7] "Cantabria"            "Castilla Leon"        "Castilla Mancha"     
#  [10] "Catalu<f1>a"          "Ceuta"                "Comunitat Valenciana"
# [13] "Extremadura"          "Galicia"              "Madrid"              
# [16] "Melilla"              "Murcia"               "Navarra"             
# [19] "Pa<ed>s Vasco"        "Rioja" 

我不明白为什么关卡没有得到正确的标签。关于可能发生的事情的任何建议？

Answer 1

我们可以使用recode的car

library(car)
prueba$cca <- recode(prueba$cca, "'Pa<ed>s Vasco'='Basque Country';'Catalu<f1>a' = 'Catalonia'")
levels(prueba$cca)
#[1] ""                     "Andalucia"            "Aragon"               "Asturias"             "Balears"              "Basque Country"       "Canarias"            
#[8] "Cantabria"            "Castilla Leon"        "Castilla Mancha"      "Catalonia"            "Ceuta"                "Comunitat Valenciana" "Extremadura"         
#[15] "Galicia"              "Madrid"               "Melilla"              "Murcia"               "Navarra"              "Rioja"