vcov.drc {drc} | R Documentation |
'vcov' returns the estimated variance-covariance matrix for the parameters in the non-linear function.
## S3 method for class 'drc': vcov(object, ..., corr = FALSE)
object |
an object of class 'drc'. |
... |
additional arguments. |
corr |
logical. If TRUE a correlation matrix is returned. |
A matrix of estimated variances and covariances.
Christian Ritz
## Fitting a four-parameter log-logistic model ryegrass.m1 <- drm(rootl ~ conc, data = ryegrass, fct = LL.4()) vcov(ryegrass.m1) vcov(ryegrass.m1, corr = TRUE)