在R中首次出现特定字符之前删除所有文本 [英] Remove all text before first occurence of specific characeter in R

问题描述

看下面的向量:

x <- c("MED - This means medic - somecode123", "HIV" - This means HIV -somecode456")

现在我想要向量:包含值

Now I want the vector: containing the values

 This means medic - somecode123` 
 This means HIV - somecode1456

我似乎无法使用gsub ...

I seem not able to solve this using gsub...

推荐答案

我们可以使用sub.匹配一个或多个非空白(\\S+)，然后是一个或多个空白(\\s+)，然后是-和空白(\\s+)的模式，并将其替换为"".

We can use sub. Match the pattern of one or more non-white space (\\S+) followed by one or more white space (\\s+) followed by - and white space (\\s+) and replace it with "".

sub('\\S+\\s+-\\s+', "", x)
#[1] "This means medic - somecode123" "This means HIV -somecode456"   

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