.choose_best_test_statistic

Chooses rows with best test statistic.

internal

Select statistically similar research groups by backward selection using various robust algorithms, including a heuristic based on linear discriminant analysis, multiple heuristics based on the test statistic, and parallelized exhaustive search.

Kyle Gorman

ldamatch

Selection of Statistically Similar Research Groups

Géza Kiss

.choose_best_test_statistic function

<dl><dt>dat</dt>
<dd>A data.table with an ind column with indices for items to
consider dropping.</dd>
<dt>condition</dt>
<dd>A factor vector containing condition labels.</dd>
<dt>covariates</dt>
<dd>A columnwise matrix containing
covariates to match the conditions on.</dd>
<dt>halting_test</dt>
<dd>A function to apply to `covariates` (in matrix form)
which is TRUE iff the conditions are matched.
Signature: halting_test(condition, covariates, thresh).
The following halting tests are part of this package:
<code>t_halt</code>, <code>U_halt</code>,
<code>l_halt</code>, <code>ad_halt</code>,
<code>ks_halt</code>, <code>wilks_halt</code>,
<code>f_halt</code>.
You can create the intersection of two or more halting
tests using <code>create_halting_test</code>.</dd>
<dt>thresh</dt>
<dd>The return value of halting_test has to be greater than
or equal to thresh for the matched groups.</dd>
<dt>tiebreaker</dt>
<dd>NULL, or a function similar to halting_test, used to
decide between cases for which halting_test yields
equal values.</dd></dl>

Arguments

Chooses rows with best test statistic. — .choose_best_test_statistic

<dl>

<dt>dat</dt>
<dd>A data.table with an ind column with indices for items to
consider dropping.</dd>


<dt>condition</dt>
<dd>A factor vector containing condition labels.</dd>


<dt>covariates</dt>
<dd>A columnwise matrix containing
covariates to match the conditions on.</dd>


<dt>halting_test</dt>
<dd>A function to apply to `covariates` (in matrix form)
which is TRUE iff the conditions are matched.
Signature: halting_test(condition, covariates, thresh).
The following halting tests are part of this package:
<code>t_halt</code>, <code>U_halt</code>,
<code>l_halt</code>, <code>ad_halt</code>,
<code>ks_halt</code>, <code>wilks_halt</code>,
<code>f_halt</code>.
You can create the intersection of two or more halting
tests using <code>create_halting_test</code>.</dd>


<dt>thresh</dt>
<dd>The return value of halting_test has to be greater than
or equal to thresh for the matched groups.</dd>


<dt>tiebreaker</dt>
<dd>NULL, or a function similar to halting_test, used to
decide between cases for which halting_test yields
equal values.</dd>

</dl>

.choose_best_test_statistic: Chooses rows with best test statistic.

Description

Usage

Value

Arguments