删除冒号之前的所有文本 [英] Remove all text before colon

问题描述

我有一个包含一定行数的文件.每行看起来像这样:

I have a file containing a certain number of lines. Each line looks like this:

TF_list_to_test10004/Nus_k0.345_t0.1_e0.1.adj:PKMYT1

我想删除:"字符之前的所有字符，以便仅保留作为基因名称的PKMYT1. 由于我不是正则表达式脚本专家，因此有人可以使用Unix(sed或awk)或R来帮助我做到这一点吗?

I would like to remove all before ":" character in order to retain only PKMYT1 that is a gene name. Since I'm not an expert in regex scripting can anyone help me to do this using Unix (sed or awk) or in R?

推荐答案

以下是在R中执行此操作的两种方法:

Here are two ways of doing it in R:

foo <- "TF_list_to_test10004/Nus_k0.345_t0.1_e0.1.adj:PKMYT1"

# Remove all before and up to ":":
gsub(".*:","",foo)

# Extract everything behind ":":
regmatches(foo,gregexpr("(?<=:).*",foo,perl=TRUE))

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