相关疑难解决方法(0)

见下文:

 paste("perf.a", "1", sep="")
    [1] "perf.a1"

如果我想分配值perf.a1怎么办？

我尝试了as.name,as.symbol等等,但无济于事:

as.name(paste("perf.a", "1", sep="")) = 5
Error in as.name(paste("perf.a", "1", sep = "")) = 5 : 
  target of assignment expands to non-language object
as.symbol(paste("perf.a", "1", sep="")) = 5
Error in as.symbol(paste("perf.a", "1", sep = "")) = 5 : 
  target of assignment expands to non-language object
noquote(paste("perf.a", "1", sep="")) = 5
Error in noquote(paste("perf.a", "1", sep = "")) = 5 : 
  target of assignment expands to non-language object

我收到了错误

Error in <my code> : target of assignment expands to non-language object

要么

Error in <my code> : invalid (do_set) left-hand side to assignment

要么

Error in <my code> : invalid (NULL) left side of assignment

它是什么意思,我该如何预防呢？