Object Finder
fmobj inspects a formula and returns a list containing the
objects referred to, with indicators as to which are unknown parameters,
covariates, factor variables, and functions.
fmobj(z, envir=parent.frame())
z |
A model formula beginning with ~, either in Wilkinson and Rogers notation or containing unknown parameters. |
envir |
The environment in which the formula is to be interpreted. |
A list, of class fmobj, containing a character vector
(objects) with the names of the objects used in a formula, and
logical vectors indicating which are unknown parameters
(parameters), covariates (covariates), factor variables
(factors), and functions (functions).
J.K. Lindsey
x1 <- rpois(20,2) x2 <- rnorm(20) x3 <- gl(2,10) # # W&R formula fmobj(~x1+x2+x3) # # formula with unknowns fmobj(~b0+b1*x1+b2*x2) # # nonlinear formulae with unknowns # log link fmobj(~exp(b0+b1*x1+b2*x2))
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