repar: Reparameterization
In dMod: Dynamic Modeling and Parameter Estimation in ODE Models

Description Usage Arguments Details Value Examples

Reparameterization

1	repar(expr, trafo = NULL, ..., reset = FALSE)

`expr`	character of the form `"lhs ~ rhs"` where `rhs` reparameterizes `lhs`. Both `lhs` and `rhs` can contain a number of symbols whose values need to be passed by the `...` argument.
`trafo`	character or equation vector or list thereof. The object where the replacement takes place in
`...`	pass symbols as named arguments
`reset`	logical. If true, the trafo element corresponding to lhs is reset according to rhs. If false, lhs wherever it occurs in the rhs of trafo is replaced by rhs of the formula.

Left and right-hand side of expr are searched for symbols. If separated by "_", symbols are recognized as such, e.g. in Delta_x where the symbols are "Delta" and "x". Each symbol for which values (character or numbers) are passed by the ... argument is replaced.

an equation vector with the reparameterization.

innerpars <- letters[1:3]
constraints <- c(a = "b + c")
mycondition <- "cond1"

trafo <- repar("x ~ x", x = innerpars)
trafo <- repar("x ~ y", trafo, x = names(constraints), y = constraints)
trafo <- repar("x ~ exp(x)", trafo, x = innerpars)
trafo <- repar("x ~ x + Delta_x_condition", trafo, x = innerpars, condition = mycondition)