Back مصفوفة الإرباك Arabic Matriu de confusió Catalan Matice záměn Czech Wahrheitsmatrix German Matriz de confusión Spanish ماتریس درهم‌ریختگی Persian Matrice de confusion French מטריצת בלבול HE Matrice di confusione Italian 混同行列 Japanese

Confusion matrix

In the field of machine learning and specifically the problem of statistical classification, a confusion matrix, also known as error matrix,[1] is a specific table layout that allows visualization of the performance of an algorithm, typically a supervised learning one; in unsupervised learning it is usually called a matching matrix.

Each row of the matrix represents the instances in an actual class while each column represents the instances in a predicted class, or vice versa – both variants are found in the literature.[2] The diagonal of the matrix therefore represents all instances that are correctly predicted.[3] The name stems from the fact that it makes it easy to see whether the system is confusing two classes (i.e. commonly mislabeling one as another).

It is a special kind of contingency table, with two dimensions ("actual" and "predicted"), and identical sets of "classes" in both dimensions (each combination of dimension and class is a variable in the contingency table).

  1. ^ Stehman, Stephen V. (1997). "Selecting and interpreting measures of thematic classification accuracy". Remote Sensing of Environment. 62 (1): 77–89. Bibcode:1997RSEnv..62...77S. doi:10.1016/S0034-4257(97)00083-7.
  2. ^ Powers, David M. W. (2011). "Evaluation: From Precision, Recall and F-Measure to ROC, Informedness, Markedness & Correlation". Journal of Machine Learning Technologies. 2 (1): 37–63. S2CID 55767944.
  3. ^ Opitz, Juri (2024). "A Closer Look at Classification Evaluation Metrics and a Critical Reflection of Common Evaluation Practice". Transactions of the Association for Computational Linguistics. 12: 820–836. arXiv:2404.16958. doi:10.1162/tacl_a_00675.

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