expr_to_fun: Convert expression into function object.
In doBy: Groupwise Statistics, LSmeans, Linear Estimates, Utilities

expr_to_fun

R Documentation

Convert expression into function object.

Description

Convert expression into function object.

Usage

expr_to_fun(expr_, order = NULL, vec_arg = FALSE)

Arguments

`expr_`	R expression.
`order`	desired order of function argument.
`vec_arg`	should the function take vector valued argument.

Examples


ee  <- expression(b1 + (b0 - b1)*exp(-k*x) + b2*x)
ff1 <- expr_to_fun(ee)
formals(ff1)

ff2 <- expr_to_fun(ee, vec_arg=TRUE)
formals(ff2)
formals(ff2)$length_parm
formals(ff2)$names_parm |> eval()

ee <- expression(matrix(c(x1+x2, x1-x2, x1^2+x2^2, x1^3+x2^3), nrow=2))
ff1 <- expr_to_fun(ee)
ff2 <- expr_to_fun(ee, vec_arg=TRUE)

formals(ff2)
formals(ff2)$length_parm
formals(ff2)$names_parm |> eval()

doBy documentation built on April 11, 2025, 6:13 p.m.