heartrate {drc} | R Documentation |
The dataset contains measurements of mean arterial pressure (mmHG) and heart rate (b/min) for a baroreflex curve.
data(heartrate)
A data frame with 18 observations on the following 2 variables.
pressure
rate
The dataset is an example of an asymmetric dose-response curve, that is not
easily handled using the log-logistic or Weibull models (LL.4
, LL.5
,
W1.4
and W2.4
), whereas the baro5
model provides a nice fit.
Ricketts, J. H. and Head, G. A. (1999) A five-parameter logistic equation for investigating asymmetry of curvature in baroreflex studies, Am. J. Physiol. (Regulatory Integrative Comp. Physiol. 46), 277, 441–454.
## Fitting the baro5 model heartrate.m1 <- drm(rate~pressure, data=heartrate, fct=baro5()) plot(heartrate.m1)