如何重命名一列中的值？

Question

值在那里出现了500次，值的名称由许多不同的字符组成。

类似这样的Data.frame：

head(df)
# Job                                                               Opinion
# Superskilled worker/skilled worker - who has at least 5 workers   No
# Manager                                                           Yes                                                          
# Officer                                                           No                                                            
# Superskilled worker/skilled worker - who has at least 5 workers   Yes
# Superskilled worker/skilled worker - who has at least 5 workers   Yes
# Manager                                                           Yes
# Officer                                                           Yes
# Manager                                                           No
# Superskilled worker/skilled worker - who has at least 5 workers   No

我想把“超级技术工人/技术工人--至少有5个工人”更名为“技术工人”。

Answer 1

选项1

df$Job <- sub("Superskilled worker///skilled worker - who has at least 5 workers","Skilled worker",df$Job)

选项2

df$Job[df$Job=="Superskilled worker/skilled worker - who has at least 5 workers"] <- "Skilled worker"

Answer 2

您可以使用sub()。

df$Job <- sub(".*(skilled worker).*", "\\1", df$Job)