Parts of an Expression Leaf
List the variables, parameters, constants, or atoms in a canonical expression.
variables(object) parameters(object) constants(object) atoms(object)
object |
A Leaf object. |
set.seed(67)
m <- 50
n <- 10
beta <- Variable(n)
y <- matrix(rnorm(m), nrow = m)
X <- matrix(rnorm(m*n), nrow = m, ncol = n)
lambda <- Parameter()
expr <- sum_squares(y - X %*% beta) + lambda*p_norm(beta, 1)
variables(expr)
parameters(expr)
constants(expr)
lapply(constants(expr), function(c) { value(c) })Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.