[R] how to get all strings in a data frame that start with a particular string

[Michael Dewey]

Dear Ana

Would it not be possible to use grep instead of grepl and get the values 
using the value = TRUE parameter?

Michael

On 10/04/2020 17:15, Ana Marija wrote:
> Hello,
> 
> Hello,
> 
> I have a data frame (tot) with about 2000 columns. How can I extract
> from it all strings that start with E14?
> 
> I tried this:
> e14 <- sapply(tot, function(x) grepl("^E14", x))
> 
> but this returns me just TRUE and FALSE vector, how do I get actual
> strings that start with E14?
> 
> Thanks
> Ana
> 
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-- 
Michael
http://www.dewey.myzen.co.uk/home.html