{"term":{"id":"10104","title":"prediction error sum of squares","longtitle":"IUPAC Gold Book - prediction error sum of squares","doi":"10.1351\/goldbook.10104","code":"10104","status":"current","initialism":"<em>initialisms<\/em>: PRESS, RSS, SSEP, SSR","synonym":"<em>synonyms<\/em>: residual sum of squares, sum of squared errors of prediction, sum of squared residuals","definitions":[{"id":1,"text":"In multivariate calibration for a prediction set of \\(N\\) data where \\(c_{i}\\) is an observed value and \\(\\hat c_{i}\\) is the predicted value. \\[E_{\\rm{PRESS}} = \\sum\\limits_{i\\,=\\,1}^{i\\,=\\,N} (\\hat c_{i} - c_{i})^2\\]","links":[{"term":"multivariate calibration","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/10153"},{"term":"root mean squared error of prediction","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/10110"}],"sources":["PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 422 (https:\/\/doi.org\/10.1515\/pac-2015-0605)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/10104\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/10104\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/10104\/plain"},"citation":"Citation: 'prediction error sum of squares' 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.10104","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":"2026-04-21T18:11:20+00:00"}}