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Linear classifier
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<p>In <a href="/facts/Machine_learning/e0w0XJTu">machine learning</a>, a linear classifier makes a <a href="/facts/Statistical_classification/jXXHRkXR">classification</a> decision for each object based on a <a href="/facts/Linear_combination/CVjL6kuN">linear combination</a> of its <a href="/facts/Feature_(machine_learning)/nzAhYxfu">features</a>. Such classifiers work well for practical problems such as <a href="/facts/Document_classification/B69lL6BH">document classification</a>, and more generally for problems with many variables (<a href="/facts/Feature_vector/nzAhYxfu">features</a>), reaching accuracy levels comparable to non-linear classifiers while taking less time to train and use. </p>