[R] Plm on splitted data

arun smartpink111 at yahoo.com
Tue Jul 24 21:52:57 CEST 2012


For testing the codes, it will be good to have a slice of "mydata".  You can use dput(head(mydata,15)) and paste the output (for first 15 lines of data) in the email.  In that way, you will get much faster response.


----- Original Message -----
From: goyalprtk <prateeka.goyal at eclerx.com>
To: r-help at r-project.org
Sent: Tuesday, July 24, 2012 11:37 AM
Subject: [R] Plm on splitted data

Hi all

I want to use plm function on splitted dataset but facing problems while
doing it.

I did the same for lm function it worked fine but now my problem forces me
to use lags into it while in a single set I have multiple type of data,
which I believe can only be done with panel data.

The code I am using is

A = split(mydata, mydata$Unique.ID.Number)
Z = lapply(A, function(df){plm(Total.Sales ~ Purchase.Score, data = df)})

It is showing this error

Error in eval(expr, envir, enclos) : object 'Total.Sales' not found

This works when we try 

Z = lapply(A, function(df){lm(Total.Sales ~ Purchase.Score, data = df)})

Thanks in advance

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