FormulaMethods {rmutil} | R Documentation |
Methods for accessing the contents of a function created from formula
produced by finterp
or a function modified by
fnenvir
.
covariates
: extract the names of the covariates.
formula
: extract the formula used to produce the function
(finterp
only).
model
: extract the model function or model matrix if W&R
notation was used.
parameters
: extract the names of the parameters.
covariates(z) formula(z) model(z) parameters(z) print(z)
z |
A function of class, formulafn . |
These methods extract information about functions of class, formulafn
,
created by finterp
or fnenvir
.
J.K. Lindsey
x1 <- rpois(20,2) x2 <- rnorm(20) # # Wilkinson and Rogers formula with three parameters fn1 <- finterp(~x1+x2) fn1 covariates(fn1) formula(fn1) model(fn1) parameters(fn1) # # nonlinear formula with unknowns fn2 <- finterp(~exp(b0+b1*x1+b2*x2)) fn2 covariates(fn2) formula(fn2) model(fn2) parameters(fn2) # # function transformed by fnenvir fn3 <- fnenvir(function(p) p[1]+p[2]*x1) covariates(fn3) formula(fn3) model(fn3) parameters(fn3)