Dear R users,
Suppose I have the following data.frame:
myID myType myNum1 myNum2 myNum3
a Single 10 11 12
b Single 15 25 35
c Double 22 33 44
d Double 4 6 8
and I want to have new records:
myID myType myNum1 myNum2 myNum3
e Single 12.5 18 23.5
f Double 13 19.5 28
where record e got its myNum1-3 as the average from record a and b, and
record f got its myNum1-3 as the average from record c and d.
and the final data.frame should be like the following:
myID myType myNum1 myNum2 myNum3
a Single 10 11 12
b Single 15 25 35
e Single 12.5 18 43.5
c Double 22 33 44
d Double 4 6 8
f Double 13 19.5 28
Any idea is appreciated. Thanks beforehand.
Ferry
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