CVXR (version 1.0)

Log-class: The Log class.

Description

This class represents the elementwise natural logarithm \(\log(x)\).

Usage

Log(x)
# S4 method for Log
to_numeric(object, values)
# S4 method for Log
sign_from_args(object)
# S4 method for Log
is_atom_convex(object)
# S4 method for Log
is_atom_concave(object)
# S4 method for Log
is_atom_log_log_convex(object)
# S4 method for Log
is_atom_log_log_concave(object)
# S4 method for Log
is_incr(object, idx)
# S4 method for Log
is_decr(object, idx)
# S4 method for Log
.grad(object, values)
# S4 method for Log
.domain(object)

Arguments

x

An '>Expression or numeric constant.

object

A '>Log object.

values

A list of numeric values for the arguments

idx

An index into the atom.

Methods (by generic)

• to_numeric: The elementwise natural logarithm of the input value.

• sign_from_args: The sign of the atom is unknown.

• is_atom_convex: The atom is not convex.

• is_atom_concave: The atom is concave.

• is_atom_log_log_convex: Is the atom log-log convex?

• is_atom_log_log_concave: Is the atom log-log concave?

• is_incr: The atom is weakly increasing.

• is_decr: The atom is not weakly decreasing.

• .grad: Gives the (sub/super)gradient of the atom w.r.t. each variable

• .domain: Returns constraints describng the domain of the node

Slots

x

An '>Expression or numeric constant.