I have updated package ggm working together with Mathias Drton. The new version 0.8 is available at CRAN. This version contains: - new functions for defining ancestral graphs (makeAG, unmakeAG) - new functions for fitting ancestral graphs and covariance graphs by ML provided by Mathias Drton (fitAncestralGraph, fitCovGraph) - a (simple) function for drawing graphs (drawGraph). Moreover some bugs were fixed and some fuctions are now more efficient. The standard adjacency matrix representation for graphs has been adopted everywhere. Giovanni
Giovanni M. Marchetti Dipartimento di Statistica, Univ. di Firenze Phone: +39 055 4237 204 viale Morgagni, 59 Fax: +39 055 4223 560 I 50134 Firenze, Italy email: gmm at ds.unifi.it