删除“."之后的字符串的一部分.

本文介绍了删除“."之后的字符串的一部分.的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在使用NCBI参考序列登录号，例如变量a:

I am working with NCBI Reference Sequence accession numbers like variable a:

a <- c("NM_020506.1","NM_020519.1","NM_001030297.2","NM_010281.2","NM_011419.3", "NM_053155.2")

要从biomart软件包中获取信息，我需要删除保藏号后的.1，.2等.我通常使用以下代码执行此操作:

To get information from the biomart package I need to remove the .1, .2 etc. after the accession numbers. I normally do this with this code:

b <- sub("..*", "", a)

# [1] "" "" "" "" "" ""

但是如您所见，这不是此变量的正确方法.有人可以帮我吗?

But as you can see, this isn't the correct way for this variable. Can anyone help me with this?

推荐答案

您只需要转义句点即可:

You just need to escape the period:

a <- c("NM_020506.1","NM_020519.1","NM_001030297.2","NM_010281.2","NM_011419.3", "NM_053155.2")

gsub("\\..*","",a)
[1] "NM_020506"    "NM_020519"    "NM_001030297" "NM_010281"    "NM_011419"    "NM_053155"

这篇关于删除“."之后的字符串的一部分.的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！