[R] cannot coerce class "matchit" into a data.frame"

[Uwe Ligges]

Piccone, Jason E. wrote:

> Greetings fellow humans,
> 
> I am attempting to export a text file after using the MatchIt package to match control with treatment subjects.  I attempted to write.table and used the following syntax:
> 
> "write.table(social,"shaka.txt",sep=" ",quote=FALSE,row.names=FALSE,col.names= FALSE)"
> 
> But received the following error message: 
> "Error in as.data.frame.default(x[[i]], optional = TRUE) : cannot coerce class "matchit" into a data.frame"
> 
> I thought that maybe I had to convert to a data frame, and tinkered with data.frame, as.data.frame, and is.data.frame, but this didn't work (although I could had done it improperly). Please pardon my novice R skills.
> 
> Any guidance will be greatly appreciated.  


"MatchIt" is a special package, so you might have to contact the author 
/ maintainer directly.

[You can save() a MatchIt object, of course, and load() it afterwards, 
if this is sufficient.]

Uwe Ligges

> Cheers,
> 
> 
> Jason E. Piccone, Ph.D.
> Research and Evaluation Specialist
> Department of Correctional Education
> 
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