What other methods are there for data smoothing?
Other methods that can be used for data smoothing include alternate forms of binning such as smooth-
ing by bin medians or smoothing by bin boundaries. Alternatively, equal-width bins can be used to
implement any of the forms of binning, where the interval range of values in each bin is constant.
Methods other than binning include using regression techniques to smooth the data by ¯tting it to a
function such as through linear or multiple regression. Classi¯cation techniques can be used to imple-
ment concept hierarchies that can smooth the data by rolling-up lower level concepts to higher-level
concepts.