用“paste"创建一个变量名在R? [英] Create a variable name with "paste" in R?
本文介绍了用“paste"创建一个变量名在R?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
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
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