summary.matchit {MatchIt} | R Documentation |
The matchit
method for the generic summary
command generates default output.
## S3 method for class 'matchit': summary(object, verbose=F, sig=2, ...)
object |
stored output from matchit . |
sig |
Optionally specifies the size of the t-statistic for a covariate to be labeled "problematic" (default=2). |
verbose |
Option to show summary statistics in sum.all and sum.matched for
all covariates, their squares, and two-way interactions when verbose=TRUE and only the
covariates themselves when verbose=FALSE (default). |
... |
Additional parameters
passed to summary.default . |
call |
The original assignment model call. |
sum.all |
Data frame containing summary statistics on all observations in the treated and control groups (means, standard deviations, t-statistics and bias statistics for all covariates). |
sum.matched |
Data frame containing summary statistics on the matched observations in the treated and control groups (means, standard deviations, t-statistics, bias statistics, and whether bias was reduced by the matching). |
Problematic |
Problematic covariates that remain imbalanced in the matched samples.
Variables listed when the absolute value of the t-statistic in the matched sample exceeds
sig . |
xn |
Sample sizes in the full and matched samples. |
q.table |
Array that contains the same information as sum.all and sum.matched
for each subclass. |
qn |
Sample sizes in the full and matched samples, by subclass. |
match.matrix |
From the matchit output. |
psclass |
From the matchit output. |
in.sample |
From the matchit output. |
Daniel Ho <deho@fas.harvard.edu>; Kosuke Imai <kimai@princeton.edu>; Gary King <king@harvard.edu>; Elizabeth Stuart<stuart@stat.harvard.edu>
Please use help.matchit
to access the matchit reference
manual. The complete document is available online at
http://gking.harvard.edu/matchit.