vardi.algorithm

matrix of link loads over time (m x n, one
  column per time)

numeric vector of starting values for OD
  flows (length k)

lambda


Runs moment-matching algorithm of Vardi (1996) until
convergence


multivariate

models

networkTomography implements the methods developed and evaluated in
Blocker and Airoldi (2011) and Airoldi and Blocker (2012). These include the
authors' own dynamic multilevel model with calibration based upon a Gaussian
state-space model in addition to implementations of the methods of Tebaldi &
West (1998; Poisson-Gamma model with MCMC sampling), Zhang et al. (2002;
tomogravity), Cao et al. (2000; Gaussian model with mean-variance relation),
and Vardi (1996; method of moments). Data from the 1router network of Cao et
al. (2000), the Abilene network of Fang et al. (2007), and the CMU network
of Blocker and Airoldi (2011) are included for testing and reproducibility.

vardi.algorithm: Run algorithm of Vardi (1996) given B and S matrices

Description

Usage

Arguments

Value

References

See Also