[R] Retrieving the matched data frame from Matching?

[David L Carlson]

The str() function will show you what is contained in m8. If you look at the manual page for Match:

> ?Match

the section labeled "Value" gives more details on what results are returned by the Match() function. The print() and summary() functions usually show abbreviated results. In this case a list with 20 elements returned. If you don't know what a list is or how to extract things from a list, you will have to learn more about R.

The official documentation: http://cran.r-project.org/manuals.html
User-contributed manuals and tutorials: http://cran.r-project.org/other-docs.html

David C

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Bert Gunter
Sent: Thursday, May 15, 2014 10:27 PM
To: Art Burke
Cc: r-help at r-project.org
Subject: Re: [R] Retrieving the matched data frame from Matching?

Don't know anything about this in particular, but ?str, as in

str(m8)

is often useful in such situations. But hopefully you'll get a better,
more specific answer.

Cheers,
Bert

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch




On Thu, May 15, 2014 at 6:13 PM, Art Burke
<Art.Burke at educationnorthwest.org> wrote:
> I'm trying to use the Matching package to create a matched dataset but I'm having trouble retrieving the data frame where the comparison cases are identified. Could someone please give me a pointer on how to do this? The call was a simple one and seems to have worked with no errors ...
>
> m8 <- Match(TR = Tr8, X = X8, M = 2)
> summary(m8)
>
> Appeciated!
>
> Art
> ____________________________________________________________
> Arthur Burke, Ph.D.
> Senior Methodology Advisor
> Education Northwest
> 101 SW Main St., Ste 500
> Portland OR 97204
> Email: art.burke at educationnorthwest.org
> Phone: 503.275.9592
>
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