[R] match() question or needle haystack problem for a data.frame

[Knut Krueger]

Am 22.10.18 um 18:02 schrieb Bert Gunter:
> I suggest you spend a bit of time with an R tutorial or two and, in 
> particular learn about "logical indexing," as this basic R construct 
> seems to be mysterious to you.

Hi Bert,

especially the "match" help area is a little bit confusing.

And additional using a couple of programming languages with different 
logical operators and different syntax is misleading me sometimes to the 
wrong direction...

So the logic operations itself are not mysterious ;-)  but the 
translation to R.
And thank's a lot to give me the keyword to find for what I am was 
looking for: logical indexing.

I can not count the sites where I was looking to solve my problem .. 
with the wrong keywords ... :-)

Kind Regards Knut