check_nleqslv_result

Inspects the termination code (`termcd`) from `nleqslv::nleqslv()` and
either returns silently on success, issues a warning for partial
convergence, or stops with an informative error message on failure.

internal

Provides pseudo-weighted estimates of means and
prevalences for finite population inference from nonprobability
samples using auxiliary information from one or multiple probability
reference surveys. The package supports estimation with multiple
reference surveys, allowing auxiliary information to be combined
when no single survey contains all variables relevant to
participation. Optional cumulative precalibration can be applied to
align weighted totals of shared variables across surveys. Methods
are based on the generalized estimating equations framework of
Landsman et al. (2026) <doi:10.1002/sim.70403> for correcting
participation bias. For a single reference survey, the package
implements the raking ratio calibration method and includes the
adjusted logistic propensity (ALP) method of Wang, Valliant, and Li
(2021) <doi:10.1002/sim.9122>, as well as the Chen-Li-Wu (CLW)
method of Chen, Li, and Wu (2020) <doi:10.1080/01621459.2019.1677241>.
Analytic variance estimation uses Taylor linearization and accounts
for complex sampling designs in the reference surveys via integration
with the 'survey' package.

Jiakun Lin

nonprobsampling

Inference for Nonprobability Samples Using Multiple Reference
Surveys

Victoria Landsman

Aya A. Mitani

check_nleqslv_result function

<dl><dt>root</dt>
<dd>The list returned by `nleqslv::nleqslv()`.</dd>
<dt>label</dt>
<dd>Character string used as a prefix in messages to identify
the calling method.</dd>
<dt>ftol</dt>
<dd>The function-value convergence tolerance, used to assess
whether partial convergence is acceptable.</dd></dl>

Arguments

Check the result returned by nleqslv — check_nleqslv_result

<dl>

<dt>root</dt>
<dd>The list returned by `nleqslv::nleqslv()`.</dd>


<dt>label</dt>
<dd>Character string used as a prefix in messages to identify
the calling method.</dd>


<dt>ftol</dt>
<dd>The function-value convergence tolerance, used to assess
whether partial convergence is acceptable.</dd>

</dl>

check_nleqslv_result: Check the result returned by nleqslv

Description

Usage

Value

Arguments