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- Matthews_correlation_coefficient abstract "The Matthews correlation coefficient is used in machine learning as a measure of the quality of binary (two-class) classifications. It takes into account true and false positives and negatives and is generally regarded as a balanced measure which can be used even if the classes are of very different sizes. The MCC is in essence a correlation coefficient between the observed and predicted binary classifications; it returns a value between −1 and +1. A coefficient of +1 represents a perfect prediction, 0 no better than random prediction and −1 indicates total disagreement between prediction and observation. The statistic is also known as the phi coefficient. MCC is related to the chi-square statistic for a 2×2 contingency table where n is the total number of observations.While there is no perfect way of describing the confusion matrix of true and false positives and negatives by a single number, the Matthews correlation coefficient is generally regarded as being one of the best such measures. Other measures, such as the proportion of correct predictions (also termed accuracy), are not useful when the two classes are of very different sizes. For example, assigning every object to the larger set achieves a high proportion of correct predictions, but is not generally a useful classification.The MCC can be calculated directly from the confusion matrix using the formula: In this equation, TP is the number of true positives, TN the number of true negatives, FP the number of false positives and FN the number of false negatives. If any of the four sums in the denominator is zero, the denominator can be arbitrarily set to one; this results in a Matthews correlation coefficient of zero, which can be shown to be the correct limiting value.The measure was introduced in 1975 by Matthews. The original formula equal to above was: As a correlation coefficient, the Matthews correlation coefficient is the geometric mean of the regression coefficients of the problem and its dual. The component regression coefficients of the Matthews correlation coefficient are markedness (deltap) and informedness (deltap').".
- Matthews_correlation_coefficient wikiPageExternalLink 412.
- Matthews_correlation_coefficient wikiPageExternalLink PMC2148069.
- Matthews_correlation_coefficient wikiPageID "12306500".
- Matthews_correlation_coefficient wikiPageRevisionID "605198011".
- Matthews_correlation_coefficient hasPhotoCollection Matthews_correlation_coefficient.
- Matthews_correlation_coefficient subject Category:Bioinformatics.
- Matthews_correlation_coefficient subject Category:Cheminformatics.
- Matthews_correlation_coefficient subject Category:Computational_chemistry.
- Matthews_correlation_coefficient subject Category:Information_retrieval.
- Matthews_correlation_coefficient subject Category:Machine_learning.
- Matthews_correlation_coefficient subject Category:Statistical_classification.
- Matthews_correlation_coefficient subject Category:Statistical_ratios.
- Matthews_correlation_coefficient subject Category:Summary_statistics_for_contingency_tables.
- Matthews_correlation_coefficient type Abstraction100002137.
- Matthews_correlation_coefficient type MagnitudeRelation113815152.
- Matthews_correlation_coefficient type Ratio113819207.
- Matthews_correlation_coefficient type Relation100031921.
- Matthews_correlation_coefficient type StatisticalRatios.
- Matthews_correlation_coefficient comment "The Matthews correlation coefficient is used in machine learning as a measure of the quality of binary (two-class) classifications. It takes into account true and false positives and negatives and is generally regarded as a balanced measure which can be used even if the classes are of very different sizes. The MCC is in essence a correlation coefficient between the observed and predicted binary classifications; it returns a value between −1 and +1.".
- Matthews_correlation_coefficient label "Matthews correlation coefficient".
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- Matthews_correlation_coefficient sameAs Q6791500.
- Matthews_correlation_coefficient sameAs Q6791500.
- Matthews_correlation_coefficient sameAs Matthews_correlation_coefficient.
- Matthews_correlation_coefficient wasDerivedFrom Matthews_correlation_coefficient?oldid=605198011.
- Matthews_correlation_coefficient isPrimaryTopicOf Matthews_correlation_coefficient.