No closed solution known for <code>linexp</code>, we use a Newton approximation.

Fits gastric emptying time series from MRI or 'scintigraphic' measurements
using nonlinear mixed-model population fits with 'nlme' and Bayesian methods with
Stan; computes derived parameters such as t50 and AUC.

Dieter Menne

gastempt

Analyzing Gastric Emptying from MRI or Scintigraphy

t50 function

<dl><dt>x</dt>
<dd>Result of a nlme fit, with named components `tempt, beta, logbeta,
kappa, logkappa` depending on model. Function used `logbeta` when it is present,
in `x`, otherwise beta, and similar for logkappa/kappa.</dd></dl>

Arguments

Compute half-emptying time from nlme parameters — t50

<dl>

<dt>x</dt>
<dd>Result of a nlme fit, with named components `tempt, beta, logbeta,
kappa, logkappa` depending on model. Function used `logbeta` when it is present,
in `x`, otherwise beta, and similar for logkappa/kappa.</dd>

</dl>

t50: Compute half-emptying time from nlme parameters

Description

Usage

Value

Arguments