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Feature (machine learning)
In
machine learning
and
pattern recognition
, a
feature
is an individual measurable property of a phenomenon being observed. Choosing informative, discriminating and independent features is a crucial step for effective algorithms in
pattern recognition
,
classification
and
regression
. Features are usually numeric, but structural features such as
strings
and
graphs
are used in
syntactic pattern recognition
. The concept of "feature" is related to that of
explanatory variable
used in
statistical
techniques such as
linear regression
.
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