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Reference.org
Quadratic classifier
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<p>In <a href="/facts/Statistics/DNPsKGYU">statistics</a>, a quadratic classifier is a <a href="/facts/Statistical_classification/jXXHRkXR">statistical classifier</a> that uses a <a href="/facts/Quadratic_function/mKxHIC3U">quadratic</a> <a href="/facts/Decision_boundary/dp8dApoX">decision surface</a> to separate measurements of two or more classes of objects or events. It is a more general version of the <a href="/facts/Linear_classifier/vsE823wQ">linear classifier</a>. </p>