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R-替换字符串的一部分_R - Fatal编程技术网
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R-替换字符串的一部分

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R-替换字符串的一部分,r,R,我有这样一个数据帧： 2014/15 All codes All admissions 2014/15 C33-C34 All diseases which can be caused by smoking 2014/15 C00-D48 All cancers 2014/15 J00-J99 All respiratory diseases 2014/15 I00-I99 All circulatory diseases 2014 All codes A

我有这样一个数据帧：

2014/15  All codes All admissions 
2014/15  C33-C34   All diseases which can be caused by smoking 
2014/15  C00-D48   All cancers   
2014/15  J00-J99   All respiratory diseases
2014/15  I00-I99   All circulatory diseases

2014  All codes All admissions 
2014  C33-C34   All diseases which can be caused by smoking 
2014  C00-D48   All cancers   
2014  J00-J99   All respiratory diseases
2014  I00-I99   All circulatory diseases
我想让今年像这样：

2014/15  All codes All admissions 
2014/15  C33-C34   All diseases which can be caused by smoking 
2014/15  C00-D48   All cancers   
2014/15  J00-J99   All respiratory diseases
2014/15  I00-I99   All circulatory diseases

2014  All codes All admissions 
2014  C33-C34   All diseases which can be caused by smoking 
2014  C00-D48   All cancers   
2014  J00-J99   All respiratory diseases
2014  I00-I99   All circulatory diseases
我该怎么做

请记住，我还有更多的时间，比如2015/16年、2009/10年。。。 所以基本上我想删除“/”之后的所有内容。 我还使用了ggplot2和tidyverse

提前谢谢

我们可以使用
substr
假设前4个字符始终是
年

admissions$Year <- substr(admissions$Year, 1, 4)

admissions$Year或使用sub:


x<-"2014/15"
sub("/.*","",x)
[1] "2014"



我也试过：招生
df$year你查过了吗？或者甚至是
separate（）
从
tidyr
套餐中？嘿！它们都能工作，但它会把它变成一个时间序列！我想把它作为一个数据帧！