防止R将文本解释为数字 [英] Preventing R from interpreting text as numeric

问题描述

我尝试在R中导入包含邮政编码信息的CSV，当我需要它作为字符时，它会解释为数字。

I am trying to import a CSV in R which has ZIP code information which R is interpreting as numeric when I need it to remain as character.

data = read.csv("zipCodeInformation.csv", stringsAsFactor = FALSE)

数据格式如下：

Lower.Zip, Upper.Zip, Zone
004,       005,       Zone.8
006,       007,       Zone.45
009,          ,       Zone.45
010,       089,       Zone.8
100,       339,       Zone.8

现在发生了什么，R将前2列解释为数字，并将其转换为以下形式：

What happens right now is R interprets the first 2 columns as numeric and turns them into the following:

Lower.Zip, Upper.Zip, Zone
4,         5,         Zone.8
6,         7,         Zone.45
9,          ,         Zone.45
10,        89,        Zone.8
100,       339,       Zone.8

推荐答案

使用 colClasses 参数 read.csv 。

Data <- read.csv(text="Lower.Zip, Upper.Zip, Zone
004,       005,       Zone.8
006,       007,       Zone.45
009,          ,       Zone.45
010,       089,       Zone.8
100,       339,       Zone.8",
colClasses=rep("character",3))  # you may want to add strip.white=TRUE

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