OK, thanks for the help!

Here a more complex example:

a=c("x","y","z")
b=c(8,14,19)
c=c(200010,535388,19929)
data=data.frame(a,b,c)

d=c("cat1","cat2","cat3","cat4","cat5","cat6")
b1=c(14,5,8,20,19,1)
c_start=c(500000,500000,200000,200000,18000,600000)
c_stop=c(550000,550000,201000,201000,20000,700000)
category=data.frame(d,b1,c_start,c_stop) 


Again I want to create a new variable, which automatically assigns the
category to the data based on matching b = b1 and c  >= c_start and
<=c_stop.

I hope this explains my problem more explicit.

Thanks!
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