boltzmann {drc} | R Documentation |
The Boltzmann model for dose-response relationships.
boltzmann(fixed = c(NA, NA, NA, NA, NA), names = c("b", "c", "d", "e", "f")) B.3(fixed = c(NA, NA, NA), names = c("b", "d", "e")) B.4(fixed = c(NA, NA, NA, NA), names = c("b", "c", "d", "e")) B.5(fixed = c(NA, NA, NA, NA, NA), names = c("b", "c", "d", "e", "f"))
fixed |
numeric vector. Specifies which parameters are fixed and at what value they are fixed. NAs for parameter that are not fixed. |
names |
a vector of character strings giving the names of the parameters (should not contain ":"). The order of the parameters is: b, c, d, e, f (see under 'Details'). |
The model is also called the logistic model (different from the log-logistic model!).
An object containing with all components needed in multdrc
.
Christian Ritz
## Fitting the Boltzmann model m1 <- multdrc(ryegrass, fct = boltzmann()) summary(m1) ## Fitting an asymmetric Boltzmann model ## requires installing the package 'NISTnls' # m2 <- drm(y~x, data = Ratkowsky3, # fct = b5(fixed = c(NA, 0, NA, NA, NA))) # plot(m2) # summary(m2) ## okay agreement with NIST values ## for the two parameters that are the same