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initx2sums
2008 Oct 22
0
newbie Syntax questions: Re-Calculating expansion factors
...pid_nu/lineon,
How should I format the data?? Dataframe or matrix??}##
TargetX2Sums <- xtabs(~tripid_nu, data= TargetX1Sums)
InitX1Sums <- xtabs(~tripid_nu+lineon, data=SurveyData)
SurveyData$NewX1= ##{some formulation of TargetX1Sums/InitX1Sums,
selecting by tripid_nu/lineon }##
InitX2Sums <- xtabs(NewX1~tripid_nu, data=SurveyData)
SurveyData$NewX2= ##{some formulation of TargetX2Sums/InitX2Sums
selecting by tripid_nu }##
Am I thinking of this correctly? What data structures/classes should I
be using? What is the syntax for the type of calculation I'm trying t...