Title: confusion matrix
Long Title: IUPAC Gold Book - confusion matrix
DOI: 10.1351/goldbook.11428
Status: current

Definition
A table layout that shows the results of a two-class/binary classifier in which columns correspond to the predicted classifications from the model and rows correspond to the observed classifications.

Note
A confusion matrix highlights the numbers of true positives TP (positives classified as positive), true negatives TN (negatives classified as negative), false positives FP (negatives classified as positive) and false negatives FN (positives classified as negatives).

Related Terms
- FN: https://goldbook.iupac.org//terms/view/11444
- FP: https://goldbook.iupac.org//terms/view/11445
- TN: https://goldbook.iupac.org//terms/view/11527
- TP: https://goldbook.iupac.org//terms/view/11528

Source
- PAC, 2016, 88, 239. 'Glossary of terms used in computational drug design, part II (IUPAC Recommendations 2015)' on page 244 (https://doi.org/10.1515/pac-2012-1204)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/11428/html
- json: https://goldbook.iupac.org/terms/view/11428/json
- xml: https://goldbook.iupac.org/terms/view/11428/xml

Citation: Citation: 'confusion matrix' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.11428
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2025-09-24T10:59:26+00:00