This node computes certain statistics between the a numeric column's values (ri) and predicted (pi) values. It computes R²=1-SSres/SStot=1-Σ(pi-ri)²/Σ(ri-1/n*Σri)² (can be negative!), Mean absolute error (1/n*Σ|pi-ri|), Mean squared error (1/n*Σ(pi-ri)²), Root mean squared error (sqrt(1/n*Σ(pi-ri)²)), Mean signed difference (1/n*Σ(pi-ri)), Mean absolute percentage error 1/n * Σ((|ri - pi|)/ |ri|), Adjusted R²=1-(1-R²)(n-1)/(n-p-1) (can be negative!). The computed values can be inspected in the node's view and/or further processed using the output table.
You want to see the source code for this node? Click the following button and we’ll use our super-powers to find it for you.
A zipped version of the software site can be downloaded here.
Do you have feedback, questions, comments about NodePit, want to support this platform, or want your own nodes or workflows listed here as well? Do you think, the search results could be improved or something is missing? Then please get in touch! Alternatively, you can send us an email to email@example.com, follow @NodePit on Twitter, or chat on Gitter!
Please note that this is only about NodePit. We do not provide general support for KNIME — please use the KNIME forums instead.