Press Release
Free Access

Table B.1.

Terms used when describing neural network performance from Pearson et al. (2019).

Term Definition
Positive (P) An object classified in the catalogues or identified by a network as a merger.
Negative (N) An object classified in the catalogues or identified by a network as a non-merger.
True Positive (TP) An object classified in the catalogues as a merger that is identified by a network as a merger.
False Positive (FP) An object classified in the catalogues as a non-merger that is identified by a network as a merger.
True Negative (TN) An object classified in the catalogues as a non-merger that is identified by a network as a non-merger.
False Negative (FN) An object classified in the catalogues as a merger that is identified by a network as a non-merger.
Recall Fraction of objects correctly identified by a network as a merger with respect to the total number of objects classified in the catalogues as mergers. TP/(TP+FN)
Fall-out Fraction of objects incorrectly identified by a network as a merger with respect to the total number of objects classified in the catalogues as mergers. FP/(TP+FN)
Specificity Fraction of objects correctly identified by a network as a non-merger with respect to the total number of objects classified in the catalogues as non-mergers. TN/(TN+FP)
Precision Fraction of objects correctly identified by a network as a merger with respect to the total number of objects identified by a network as a merger. TP/(TP+FP)
Negative Predictive Value (NPV) Fraction of objects correctly identified by a network as a non-merger with respect to the total number of objects identified by a network as a non-merger. TN/(TN+FN)
Accuracy Fraction of objects, both merger and non-merger, correctly identified by a network. (TP+TN)/(TP+FP+TN+FN)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.