r 程序将 yes/no 变量更改为 1/0 - "变量“奖牌"不是一个因素"； [英] r program changing yes/no variable to 1/0 - " variable 'medal' is not a factor"

问题描述

我是 R 的新手.我有一个分类变量，我喜欢制作线性模型并用它进行预测，但 RStudio 不允许我这样做，除非我更改变量的类型.如何将是/否更改为 1/0?我的错误是变量‘奖牌’不是一个因素"我试过了:

I am new to R. I have a categorical variable that I like to make a linear model and do prediction with it but RStudio does not let me do so unless I change the type of the variable. How can I change the yes/no to 1/0? my error is " variable 'medal' is not a factor" I have tried :

> sport$medal <- factor(sport$medal)
> is.factor(sport$medal)
[1] FALSE

推荐答案

除了明显的错别字...

Apart from the obvious typo...

如何将是/否更改为 0/1?

How can I change the yes/no to 0/1?

你需要

sport$medal <- factor(sport$medal, levels = c("yes", "no"))

默认行为将为您提供 0 代表否"和 1 代表是"，因为n"按字母顺序排在y"之前.

The default behaviour will give you 0 for "no" and 1 for "yes", as "n" comes ahead of "y" in alphabetical order.

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