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. Author manuscript; available in PMC: 2015 Feb 26.
Published in final edited form as: IEEE Pulse. 2014 Sep-Oct;5(5):45–48. doi: 10.1109/MPUL.2014.2339402

FIGURE 2.

FIGURE 2

A graphical model representation of the time-series models: (a) a first-order VAR model with static parameters θ, (b) a TVAR with dynamic patameters θ1θN, and (c) an SVAR model, which includes a collection of J VAR models, with the Markov transition matrix Z. Each node represents a random variable, and the lack of an edge represents the conditional independence relationship among the variables. The time-series samples y1,…, yN are observed, and the remaining variables are latent.