
twang
ObjectsGenerates balance statistics for ps
, mnps
, and iptw
objects from twang and for ps.cont
objects from twangContinuous.
# S3 method for ps
bal.tab(x,
stop.method,
stats,
int = FALSE,
poly = 1,
distance = NULL,
addl = NULL,
data = NULL,
continuous,
binary,
s.d.denom,
thresholds = NULL,
weights = NULL,
cluster = NULL,
imp = NULL,
pairwise = TRUE,
s.weights = NULL,
abs = FALSE,
subset = NULL,
quick = TRUE,
...)
For binary or continuous point treatments, if clusters are not specified, an object of class "bal.tab"
containing balance summaries for the ps
object. See bal.tab()
for details.
If clusters are specified, an object of class "bal.tab.cluster"
containing balance summaries within each cluster and a summary of balance across clusters. See bal.tab.cluster
for details.
If mnps()
is used with multi-category treatments, an object of class "bal.tab.multi"
containing balance summaries for each pairwise treatment comparison and a summary of balance across pairwise comparisons. See bal.tab.multi
for details.
a ps
, mnps
, iptw
, or ps.cont
object; the output of a call to twang::ps()
, twang::mnps()
, twang::iptw()
or twangContinuous::ps.cont()
.
a string containing the names of the stopping methods used in the original call to ps()
, mnps()
, or iptw()
. Examples include "es.max"
or "ks.mean"
for ps
and mnps
objects. bal.tab
will assess balance for the weights created by those stopping methods. The names can be abbreviated as long as the abbreviations are specific enough. If no stopping methods are provided, bal.tab
will default to displaying balance for all available stopping methods. Ignored for ps.cont
objects.
see bal.tab()
for details.
See below for special notes on the distance
, s.d.denom
, and s.weights
arguments.
The following arguments have special notes when used with these input objects:
the propensity scores generated by ps()
and iptw()
(but not mnps()
or ps.cont()
) are automatically included and named "prop.score.stop.method".
if not specified, for ps
objects, bal.tab()
will use "treated" if the estimand of the call to ps()
is the ATT and "pooled" if the estimand is the ATE; for mnps
objects, bal.tab()
will use "treated" if treatATT
was specified in the original call to mnps
and "pooled" otherwise. Use "all" to get the same values computed by bal.table
in twang. Abbreviations allowed.
if sampw
was supplied in the call to ps()
, mnps()
, iptw()
, or ps.cont()
, they will automatically be supplied to s.weights
and do not need be specified again (though there is no harm if they are).
Noah Greifer
bal.tab.ps()
generates a list of balance summaries for the input object given, and functions similarly to twang::bal.table()
.
bal.tab()
for details of calculations.
bal.tab.cluster
for more information on clustered data.
bal.tab.multi
for more information on multi-category treatments.
bal.tab.msm
for more information on longitudinal treatments.
if (FALSE) { # requireNamespace("twang", quietly = TRUE)
library(twang); data("lalonde", package = "cobalt")
## Using ps() for generalized boosted modeling
ps.out <- ps(treat ~ age + educ + married + race +
nodegree + re74 + re75, data = lalonde,
stop.method = c("ks.mean", "es.mean"),
estimand = "ATT", verbose = FALSE)
bal.tab(ps.out, stop.method = "ks.mean", un = TRUE,
m.threshold = .1, disp.ks = TRUE)
}
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