R/151_reductions_dcp2cone_canonicalizers_exp_canon.R

In CVXR: Disciplined Convex Optimization

#####
## DO NOT EDIT THIS FILE!! EDIT THE SOURCE INSTEAD: rsrc_tree/reductions/dcp2cone/canonicalizers/exp_canon.R
#####

## CVXPY SOURCE: reductions/dcp2cone/canonicalizers/exp_canon.py
## exp(x) -> t where ExpCone(x, 1, t)


exp_canon <- function(expr, args, solver_context = NULL) {
  x <- cvxr_promote(args[[1L]], expr@shape)
  t <- Variable(shape = expr@shape)
  ones <- Constant(matrix(1, nrow = expr@shape[1L], ncol = expr@shape[2L]))
  constraints <- list(ExpCone(x, ones, t))
  list(t, constraints)
}

method(dcp_canonicalize, Exp) <- exp_canon
method(has_dcp_canon, Exp) <- function(expr) TRUE