flatten_constraints: Flatten constraint matrix
In jrnold/flatter: Flattened arrays

Description Usage Arguments Value Examples

Given a matrix (described below), this will create a list of vectors which give the locations of unconstrained, constrant, positive, and negative elements.

1	flatten_constraints(x)

`x`	Numeric `matrix` with `NA` for unconstrained elements, a finite value for constrant entries, `Inf` for elements to be bound below at 0, and `-Inf` for elements to be bound above at 0.

list with elements

var_n: Number of unstrained entries
var_i: Indices of unconstrained entries
const_n: Number of constant entries
const_val: Values of constant entries
const_i: Indices of constant entries
pos_n: Number of positive entries (truncated below at 0)
pos_i: Indices of positive entries
pos_n: Number of negative entries (truncated above at 0)

constraints <- matrix(NA, 4, 2)
# constants
constraints[1, 1] <- 1
constraints[1, 2] <- 0
# positive values
constraints[2, 1] <- Inf
# negative values
constraints[2, 2] <- -Inf
flatten_constraints(constraints)