通过强制引入 NA 时如何避免警告 [英] How to avoid warning when introducing NAs by coercion

问题描述

我通常更喜欢对 R 进行编码，这样我就不会收到警告，但我不知道在使用 as.numeric 转换字符向量时如何避免收到警告.

例如:

x <- as.numeric(c("1", "2", "X"))

会给我一个警告，因为它通过强制引入了 NA.我想要通过强制引入的 NA - 有没有办法告诉它是的，这就是我想要做的".还是我应该忍受警告?

或者我应该为此任务使用不同的函数吗?

解决方案

使用 suppressWarnings():

suppressWarnings(as.numeric(c("1", "2", "X")))[1] 1 2 不适用

这会抑制警告.

I generally prefer to code R so that I don't get warnings, but I don't know how to avoid getting a warning when using as.numeric to convert a character vector.

For example:

x <- as.numeric(c("1", "2", "X"))

Will give me a warning because it introduced NAs by coercion. I want NAs introduced by coercion - is there a way to tell it "yes this is what I want to do". Or should I just live with the warning?

Or should I be using a different function for this task?

解决方案

Use suppressWarnings():

suppressWarnings(as.numeric(c("1", "2", "X")))
[1]  1  2 NA

This suppresses warnings.

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