Enrichment Plotter

This node draws enrichment curves often used in virtual screening. For this the user can choose a column by which the data is sorted and represents the x-axis. The values on the y-axis are formed by the sum of the hits in a second column that is also selected by the user. A row is considered a hit if the value is greater than 0. The steeper the resulting curve, the better the enrichment is. Optionally the y-axis can show the sum of the hit values instead of the number of hits.
The two gray lines in the view show the enrichment if the data points were ordered randomly (lower diagonal) and the optimal enrichment if all hits are ordered before the first non-hit (upper diagonal).

Options

Sort column

Select the column by which the rows should be sorted and plotted as the x-axis.

Hit column

Select the column that contains the hit values.

Sort descending

Checking this before adding a curve sorts the data points in the sort column descendingly instead if ascendingly. This is a setting specific to each curve.

Plot sum of hit values

Check this if the y-axis should show the sum of the values in the hit column.

Hit threshold

Check this and enter a threshold if the y-axis should show the sum of data points that have values equal or greater than the threshold.

Input Ports

Input data with predicted values and actual values

Output Ports

A one-column table with the area(s) under the enrichment curve(s)

Views

Enrichment Plot

Enrichment plot

Installation

To use this node in KNIME, install KNIME Base nodes from the following update site:

A zipped version of the software site can be downloaded here.

You don't know what to do with this link? Read our NodePit Product and Node Installation Guide that explains you in detail how to install nodes to your KNIME Analytics Platform.

Developers

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