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t. e. In machine learning and statistical classification, multiclass classification or multinomial classification is the problem of classifying instances into one of three or more classes (classifying instances into one of two classes is called binary classification). For example, deciding on whether an image is showing a banana, an orange, or ...
To evaluate a classifier, one compares its output to another reference classification – ideally a perfect classification, but in practice the output of another gold standard test – and cross tabulates the data into a 2×2 contingency table, comparing the two classifications.
Linear classifier. In the field of machine learning, the goal of statistical classification is to use an object's characteristics to identify which class (or group) it belongs to. A linear classifier achieves this by making a classification decision based on the value of a linear combination of the characteristics.
Classification rule. Given a population whose members each belong to one of a number of different sets or classes, a classification rule or classifier is a procedure by which the elements of the population set are each predicted to belong to one of the classes. [1] A perfect classification is one for which every element in the population is ...
The 100 seats in the United States Senate are divided into three classes for the purpose of determining which seats will be up for election in any two-year cycle, with only one class being up for election at a time. With senators being elected to fixed terms of six years, the classes allow about a third of the seats to be up for election in any ...
Classification is the activity of assigning objects to a list of pre-existing classes or categories. This is distinct from the problem of establishing what the classes themselves ought to be, perhaps through a form of cluster analysis. [1] Examples include diagnostic tests, identifying spam emails and deciding whether to give someone a driving ...
Country singer Zach Bryan does not want bad blood with Taylor Swift — or her fans.. On Thursday, the “I Remember Everything” singer apologized to Swift for remarks he has since described as ...
Statistical classification. When classification is performed by a computer, statistical methods are normally used to develop the algorithm. Often, the individual observations are analyzed into a set of quantifiable properties, known variously as explanatory variables or features. These properties may variously be categorical (e.g.