Data from 4-node network with star topology collected from Bell Labs; used in Cao et al. (2000).
The list bell.labs, which contains several objects:
A, the routing matrix for this
network (truncated for full row rank)
data.frame with all data
X, a matrix of
origin-destination flows formatted for analysis
Y, a matrix of link loads formatted for analysis
tvec, a vector of times
In this data, we
A %*% t(X) == t(Y).
The list bell.labs contains the following:
The routing matrix
A. The columns of this
matrix correspond to individual OD flows (the columns of
X), and its rows correspond to individual link loads (the
columns of Y).
value, level of traffic recorded
nme, name of flow or load
method, whether flow was directly observered or inferred (all observed)
time, time of observation
od, flag for origin-destination vs. link loads
orig, origin of flow or load
dest, destination of flow or load
node, node involved in flow or load
The OD matrix X. Columns correspond to individual OD flows, and the rows correspond to observations.
The link load matrix Y. Columns of the Y matrix correspond to individual link loads, and the rows correspond to observations.
The vector tvec, containing the time in decimal hours since midnight for each observation.
J. Cao, D. Davis, S. Van Der Viel, and B. Yu. Time-varying network tomography: router link data. Journal of the American Statistical Association, 95:1063-75, 2000.