Dear R-help Î would like to know if there is a short solution in R for this merging problem...
Let say I have a dataset A as: TYPE DATE A 2 A 5 A 20 B 10 B 2 (there can be duplicates for the same type and date) and I have another dataset B as : TYPE Special_Date A 2 A 6 A 20 A 22 B 5 B 6 The question is : I would like to obtain the difference between the date of each observation in A and the closest special date in B with the same type. In case of ties I would take the latest date of the two. For example I would obtain here TYPE DATE Difference A 2 0=2-2 A 5 -1=5-6 A 20 0=20-20 B 10 +4=10-6 B 2 -3=2-5 Do you know how to (simply?) obtain this in R? Many thanks! Best Regards ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
