Convert matrix to graph

Creates a graph object representing the graph structure implied by a parameter matrix.

Usage

Gamma2graph(Gamma, tol = get_large_tol(), check = TRUE)

Sigma2graph(Sigma, tol = get_large_tol(), k = NULL, full = FALSE, check = TRUE)

Theta2graph(Theta, tol = get_large_tol(), k = NULL, full = FALSE, check = TRUE)

partialMatrixToGraph(M)

Arguments

Gamma

Numeric \(d \times d\) variogram matrix.

tol

Numeric scalar. Entries in the precision matrix with absolute value smaller than this are considered to be zero.

check

Whether to check the inputs and call ensure_matrix_symmetry_and_truncate_zeros on the outputs.

Sigma

Numeric \(d \times d\) or \((d-1) \times (d-1)\) covariance matrix.

k

NULL if the input/output matrix is \(\Sigma\)/\(\Theta\). Else, an integer between 1 and d indicating the value of k in \(\Sigma^k\), \(\Theta^k\).

full

Logical. If TRUE and !is.null(k), the input/output matrix is a \(d \times d\) matrix with the kth row filled with zeros.

Theta

Numeric \(d \times d\) or \((d-1) \times (d-1)\) precision matrix.

M

Partial matrix with NA entries indicating missing edges.

Value

An igraph::graph object.

See also

Other parameter matrix transformations: Gamma2Sigma(), chi2Gamma(), par2Matrix()