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CVXR (version 0.95)

QuadOverLin-class: The QuadOverLin class.

Description

This class represents the sum of squared entries in X divided by a scalar y, \(\sum_{i,j} X_{i,j}^2/y\).

Usage

QuadOverLin(x, y)
# S4 method for QuadOverLin
validate_args(object)
# S4 method for QuadOverLin
to_numeric(object, values)
# S4 method for QuadOverLin
size_from_args(object)
# S4 method for QuadOverLin
sign_from_args(object)
# S4 method for QuadOverLin
is_atom_convex(object)
# S4 method for QuadOverLin
is_atom_concave(object)
# S4 method for QuadOverLin
is_incr(object, idx)
# S4 method for QuadOverLin
is_decr(object, idx)
# S4 method for QuadOverLin
is_quadratic(object)
# S4 method for QuadOverLin
graph_implementation(object, arg_objs, size,
  data = NA_real_)

Arguments

x

An '>Expression or numeric matrix.

y

A scalar '>Expression or numeric constant.

object

A '>QuadOverLin object.

values

A list of arguments to the atom.

idx

An index into the atom.

arg_objs

A list of linear expressions for each argument.

size

A vector with two elements representing the size of the resulting expression.

data

A list of additional data required by the atom.

Methods (by generic)

  • validate_args: Check the dimensions of the arguments.

  • to_numeric: The sum of the entries of x squared over y.

  • size_from_args: The atom is a scalar.

  • sign_from_args: The atom is positive.

  • is_atom_convex: The atom is convex.

  • is_atom_concave: The atom is not concave.

  • is_incr: A logical value indicating whether the atom is weakly increasing.

  • is_decr: A logical value indicating whether the atom is weakly decreasing.

  • is_quadratic: True if x is affine and y is constant.

  • graph_implementation: The graph implementation of the atom.

Slots

x

An '>Expression or numeric matrix.

y

A scalar '>Expression or numeric constant.