用“paste"创建一个变量名在R? [英] Create a variable name with "paste" in R?

问题描述

见下文:

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

如果我想为 perf.a1 赋值怎么办?

What if I want to assign a value to perf.a1?

我试过as.name、as.symbol 等，都没有用:

I tried as.name, as.symbol, etc., with no avail:

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

推荐答案

您可以使用 assign (doc) 来改变 perf.a1 的值:

You can use assign (doc) to change the value of perf.a1:

> assign(paste("perf.a", "1", sep=""),5)
> perf.a1
[1] 5

这篇关于用“paste"创建一个变量名在R?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！