[R] add specific fields in for loop

[Rui Barradas]

Às 16:18 de 15/11/2022, Kai Yang via R-help escreveu:
> Hi Team,
> I can write a for loop like this:
> for (i in columns(df)){
>    ......
> }
> 
> But it will working on all column in dataframe df. If I want to work on some of specific fields (say: the fields' name content 'date'), how should I modify the for loop? I changed the code below, but it doesn't work.
> for (i in columns(df) %in% 'date' ){
>    .....
> }
> 
> 
> Thank you,
> Kai
> 
> 	[[alternative HTML version deleted]]
> 
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Hello,

Something like this?


for(i in grep("date", names(df))) {
   #
}


Hope this helps,

Rui Barradas