reformulas (version 0.2.0)

splitForm: Split formula containing special random effect terms

Description

Parse a formula into fixed formula and random effect terms, treating 'special' terms (of the form foo(x|g[,m])) appropriately

Usage

splitForm(
  formula,
  defaultTerm = "us",
  allowFixedOnly = TRUE,
  allowNoSpecials = TRUE,
  debug = FALSE,
  specials = findReTrmClasses()
)
noSpecials(term, delete = TRUE, debug = FALSE, specials = findReTrmClasses())

Value

a list containing elements fixedFormula; reTrmFormulas list of x | g formulas for each term; reTrmAddArgs list of function+additional arguments, i.e. list() (non-special), foo() (no additional arguments), foo(addArgs) (additional arguments); reTrmClasses (vector of special functions/classes, as character)

Arguments

formula

a formula containing special random effect terms

defaultTerm

default type for non-special RE terms

allowFixedOnly

(logical) are formulas with no RE terms OK?

allowNoSpecials

(logical) are formulas with only standard RE terms OK?

debug

debugging mode (print stuff)?

term

language object

Author

Steve Walker

Details

Taken from Steve Walker's lme4ord, ultimately from the flexLambda branch of lme4 https://github.com/stevencarlislewalker/lme4ord/blob/master/R/formulaParsing.R. Mostly for internal use.

Examples

splitForm(~x+y)                     ## no specials or RE
splitForm(~x+y+(f|g))               ## no specials
splitForm(~x+y+diag(f|g))           ## one special
splitForm(~x+y+(diag(f|g)))         ## 'hidden' special
splitForm(~x+y+(f|g)+cs(1|g))       ## combination
splitForm(~x+y+(1|f/g))             ## 'slash'; term
splitForm(~x+y+(1|f/g/h))             ## 'slash'; term
splitForm(~x+y+(1|(f/g)/h))             ## 'slash'; term
splitForm(~x+y+(f|g)+cs(1|g)+cs(a|b,stuff))  ## complex special
splitForm(~(((x+y))))               ## lots of parentheses
splitForm(~1+rr(f|g,n=2))
splitForm(~1+s(x, bs = "tp"))

noSpecials(y~1+us(1|f))
noSpecials(y~1+us(1|f),delete=FALSE)
noSpecials(y~us(1|f))
noSpecials(y~us(1|f), delete=FALSE)
noSpecials(y~us(1|f), debug=TRUE)
noSpecials(y~us+1)  ## should *not* delete unless head of a function
noSpecials(~us(1|f)+1)   ## should work on a one-sided formula!
noSpecials(~s(stuff) + a + b, specials = "s")