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2010 Jun 13
0
Weighted Average application on Summary Dataset
...R2 734 24 B SR2 1054 31 A Sr1 600 43 A SR3 1033 60 A Sr1 1163 30 B SR4 732 43 B SR4 988 70 A SR3 569 25 B SR4 1073 65 Output I require: R SR WA_A N (Sum of N) A SR1 912.0098 102 SR3 896.5294118 85 B SR2 914.3636364 55 SR4 957.1966292 178 (Weighted Average of A for N weights) # FUNCTION TO CALCULATE THE WEIGHTED AVERAGE FOR A WEIGHTED BY N WA<-function(...