dnormal.Rd
Double normal ogive
# S4 method for FLQuant,FLPar
dnormal(age, params, ...)
FLQuant or FLCohort
FLPar
with parameters a1
age at maximum, sl
SD for lefthand limb and sr
SD for righthand limb.
any other arguments
Returns an object of same class as age
e.g. FLQuant
if (FALSE) {
params=FLPar(a1=4,sl=2,sr=5000)
dnormal(FLQuant(1:10,dimnames=list(age=1:10)),params)
}