Thanks Stefano;
Ani
On Mar 9, 2013, at 12:14 PM, stefano iacus <stefano.iacus(a)unimi.it> wrote:
try removing quotes "" around my.dat
i.e.
data=my.dat
Sent from my StrawBerry®
On 09/mar/2013, at 17:58, "Ruhil, Anirudh" <ruhil(a)ohio.edu> wrote:
> Hello All;
>
> I am trying to get a situation of matching for multiple treatments resolved via cem
but ran into an error message with my data. I then switched to a randomly generated data
frame (see below) but still get the error message. Any clues as to the culprit?
>
>> set.seed(03092013)
>> a <- as.factor(c(rep(1,35),rep(2,35), rep(3,30)))
>> b <- runif(100, min=0, max=100)
>
>> my.dat <- data.frame(a, b)
>
>> mat <- cem(treatment="a", data="my.dat")
> Error: Data must be a data frame
>
>> class(my.dat)
> [1] "data.frame"
>> str(my.dat)
> 'data.frame': 100 obs. of 2 variables:
> $ a: Factor w/ 3 levels "1","2","3": 1 1 1 1 1 1 1 1 1
1 ...
> $ b: num 20.4 16.7 87 81.1 87.9 ...
>
> many thanks in advance!!
>
> Ani
>
>
>
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Anirudh V.S. Ruhil
Associate Director of Research and Graduate Programs/Associate Professor
OHIO UNIVERSITY
The Voinovich School of Leadership and Public Affairs
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