将字符串转换为变量名 [英] Convert string to a variable name

问题描述

我正在使用 R 来解析以下形式的字符串列表:

I am using R to parse a list of strings in the form:

original_string <- "variable_name=variable_value"

首先，我从原始字符串中提取变量名称和值，并将值转换为数字类.

First, I extract the variable name and value from the original string and convert the value to numeric class.

parameter_value <- as.numeric("variable_value")
parameter_name <- "variable_name"

然后，我想将该值分配给与 parameter_name 字符串同名的变量.

Then, I would like to assign the value to a variable with the same name as the parameter_name string.

variable_name <- parameter_value

执行此操作的功能是什么?

What is/are the function(s) for doing this?

推荐答案

assign 就是您要找的.

assign is what you are looking for.

assign("x", 5)

x
[1] 5

但买家要当心.

参见 R 常见问题 7.21http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-turn-a-string-into-a-variable_003f

See R FAQ 7.21 http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-turn-a-string-into-a-variable_003f

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