Nicole A. Lazar
We often teach in data analysis courses that
one should look at the data before beginning any serious
Indeed, visualization and
modeling should go hand in hand. Each can inform the
other and each process is enriched by the use of the other.
Judicious use of graphics can save the practitioner
from trying to fit overly-complicated models, while
at the same time opening a window on interpretation.
The power of simple plots as a tool for learning about
moderately complex data structures
is demonstrated via example.
Keywords: Changepoint model, Curve fitting, Permutation test, Visualization