coef.breathtestfit: S3 coef and summary for breathtestfit

In breathtestcore: Core Functions to Read and Fit 13c Time Series from Breath Tests

S3 coef and summary for breathtestfit

Description

Function coef extracts the estimates such as t50, tlag, from fitted 13C beta exponential models. The result is the same as fit$coef, but without column stat, which always is "estimate" for nls_fit and nlme_fit.

The summary method only extracts t50 by the Maes/Ghoos method

Usage

## S3 method for class 'breathtestfit'
coef(object, ...)

Arguments

object	of class breathtestfit, as returned by nls_fit or nlme_fit
...	other parameters passed to methods

Examples

# Generate simulated data
data = cleanup_data(simulate_breathtest_data())
# Fit with the population method
fit = nlme_fit(data)
# All coefficients in the long form
coef(fit)
# Access coefficients directly
fit$coef
# Only t50 by Maes/Ghoos
# Can also be used with stan fit (slow!)
## Not run: 
if (require("breathteststan")) {
  fit = stan_fit(data, iter = 300, chain = 1)
  coef(fit)
  # We get quantiles here in key/value format
  unique(fit$coef$stat)
}

## End(Not run)

breathtestcore documentation built on Feb. 16, 2023, 10:42 p.m.