Teo ha scritto nel messaggio...
>Anyone knows in what consist the Mahanalobis distance??
>I have to measure the distance between two histograms...
>
from the StatSoft website (Glossary):
"Mahalanobis distance. One can think of the independent variables
(in a regression equation) as defining a multidimensional space in which
each observation can be plotted. Also, one can plot a point representing
the means for all independent variables. This "mean point" in the
multidimensional
space is also called the centroid. The Mahalanobis distance is the distance
of a case from the centroid in the multidimensional space, defined by the
correlated
independent variables (if the independent variables are uncorrelated,
it is the same as the simple Euclidean distance).
Thus, this measure provides an indication of whether or not an observation
is an outlier with respect to the independent variable values."
Proper citation:
StatSoft, Inc. (1999). Electronic Statistics Textbook. Tulsa, OK: StatSoft.
WEB: http://www.statsoft.com/textbook/stathome.html.
Lorenzo Camprini
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computer programmer,
technical assistant in electronics for computer science
in a college-level school
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Email: [EMAIL PROTECTED]
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