Chicago R User Group (Chicago RUG) Data and Statistics Message Board › How to group this kind of data
I have a data set which is like this (but more larger)
It is sorted by "Daughter". As you can see, "Mother" is a record of the "Daughter" of the former observation. Now, I need to group them base on the first number of each link and have a output like this:
Is there a way to to come up the output I want?
Can you provide me your guidance?