gslnls (version 1.4.1)

hatvalues.gsl_nls: Calculate leverage values

Description

Returns leverage values (hat values) from a fitted "gsl_nls" object based on the estimated variance-covariance matrix of the model parameters.

Usage

# S3 method for gsl_nls
hatvalues(model, ...)

Value

Numeric vector of leverage values similar to hatvalues.

Arguments

model

An object inheriting from class "gsl_nls".

...

At present no optional arguments are used.

See Also

hatvalues

Examples

## data
set.seed(1)
n <- 25
xy <- data.frame(
 x = (1:n) / n,
 y = 2.5 * exp(-1.5 * (1:n) / n) + rnorm(n, sd = 0.1)
)
## model
obj <- gsl_nls(fn = y ~ A * exp(-lam * x), data = xy, start = c(A = 1, lam = 1))

hatvalues(obj)