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VisiCube's Time-Series Matrix
A time-series plot is a univariate plot in which
the variation of a measure across time is presented.
Every potential instance of that time dimension
(between the minimum and maximum) is included.
If a time instance has no measurement, the line is broken at this point
and flagged with a red marker.
The following is a matrix of such plots. In a VisiCube matrix, you are
presented individual plots for a single set of records...each for a different measure.
A matrix gives you the ability to quickly compare the different measures.
In this matrix of melanoma incidence and sunspot activity,
a number of observations might be made.
Individually, each plot shows periodic and regular oscillation,
though the variation in sunspot activity seems much more pronounced
and the oscillation more regular.
By comparing the two plots, it can also be seen that the peaks in the incidence
data regularly follow the peaks in the sunspot activity by a few years
and that the periodicity of each is about 10 years.
A fundamental difference between the two is that the incidence is increasing
over time while the sunspot activity remains consistent.
This would suggest that, though sunspot activity may contribute to the incidence
of melanoma, it cannot be the only cause.
The data presented here is from a study of the incidence of malignant
melanoma in Connecticut which was conducted by
A. Houghton, E. W. Munster, and M. V. Viola. It was published as
Increased Incidence of Malignant Melanoma After Peaks of Sunspot Activity
in 1978 in The Lancet.
This data (and visual) is supplied with VisiCube as a sample project.