如何在R中将百分比字符转换为数字 [英] How to convert character of percentage into numeric in R

问题描述

将百分比字符转换为数字时遇到问题。例如。我想将 10％转换为10％，但是

I run into a problem when converting character of percentage to numeric. E.g. I want to convert "10%" into 10%, but

as.numeric("10%")

返回 NA 。您有任何想法吗？

returns NA. Do you have any ideas?

推荐答案

10％的定义不是数字矢量。因此，答案NA是正确的。您可以通过以下方式将包含这些数字的字符向量转换为数字：

10% is per definition not a numeric vector. Therefore, the answer NA is correct. You can convert a character vector containing these numbers to numeric in this fashion:

percent_vec = paste(1:100, "%", sep = "")
as.numeric(sub("%", "", percent_vec))

这是通过使用sub将％字符替换为空而实现的。

This works by using sub to replace the % character by nothing.

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