在R中修剪数据，去掉“*" [英] Trimming data in R, getting rid of "*"

问题描述

我有一个如下所示的数据集:

I have a data set which looks like:

> data<-c( "IGHV1-2*02 F, or  IGHV1-2*03 F","IGHV3-23*01 F, or 
> IGHV3-23*04 F","IGHV2-70*01 F","IGHV7-4-1*01")

我想保留V1-2"的首次亮相例如并删除后面的任何内容(包括*").所以我尝试了以下方法:

I would like to keep the first appearance of "V1-2" for example and delete anything which follows (including the "*"). So I tried the following:

> data.substr<-substr(data,4,9)
> data.substr1<-gsub("*","",data.substr)

但我仍然无法摆脱*"，可能是因为它用作占位符......有人有想法吗?

but I still cant get rid of the "*", probably because it serves as a placeholder... Does anyone have an idea?

推荐答案

gsub("[*].*$","",data)

将 * 放在方括号中，它将被视为字符，然后任何值 .* 直到字符串 $ 的末尾被删除.

put * in square brackets, it will be treated as character, then any value .* until the end of the string $ will be removed.

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