is about specifies value of data item dichotomous variable categorical variable confusion matrix 1 2 1 Philippe Rocca-Serra a confusion matrix is a 2 by 2 contingency table used to evaluate the performance of a classifier, often a machine-learning classifier and that allows visualization of the performance of an algorithm, typically a supervised learning one. It defines 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). adapted from wikipedia: https://en.wikipedia.org/wiki/Confusion_matrix last accessed: 22.10.2019 https://www.rdocumentation.org/packages/caret/versions/3.45/topics/confusionMatrix from: https://www.rdocumentation.org/packages/caret/versions/3.45/topics/confusionMatrix matrix ready for release