summary(m.out) is a list with items with those names. Once you know the names, you can extract them in the same way as you'd extract any element from a list: by name, by position, etc.
On Sun, Jun 26, 2011 at 10:48 AM, Ana Kolar <annakolar at yahoo.com> wrote:
Thank you Sarah! But names(summary(m.out)) gives only the names and no data. I actually need to extract data (to get a table of data out of that list so that it can be analysed further on). Any idea regarding that? Ana
________________________________
From: Sarah Goslee <sarah.goslee at gmail.com>
To: Ana Kolar <annakolar at yahoo.com>
Cc: R <r-help at r-project.org>
Sent: Sunday, 26 June 2011, 16:11
Subject: Re: [R] how to extract data from a function printout - example
provided
As a start, run matchit() for a test dataset and look at:
names(m.out)
and
names(summary(m.out))
You can save those named components in the usual ways.
Sarah
On Sun, Jun 26, 2011 at 10:06 AM, Ana Kolar <annakolar at yahoo.com> wrote:
Hi there,
Does anyone know how to extract data from a function that prints out two
or more summaries? In the function below (the whole code is provided) we get
5 different tables of data. I would like to split each of these tables in a
separate file (while the function itself shouldn't be changed), so that
further analysis on each data set could be carried out. Your help is deeply
appreciated. Have a good day. Ana
Here is the code:
library(MatchIt)
f <- treat ~ age + I(age^2) + educ + I(educ^2) + black + hispan +
??? married + nodegree + re74 + I(re74^2) + re75 + I(re75^2)
d <- lalonde
m <- "nearest"
matching <- function(formula,data,method){
????????? library(MatchIt)
????????? m.out <- matchit(formula=f, data=d, method=m)
????????? print(m.out)
????????? print(summary(m.out))
}
matching(f,d,m)
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Sarah Goslee http://www.functionaldiversity.org