The following node is available in the Open Source KNIME predictive analytics and data mining platform version 2.7.1. Discover over 1000 other nodes, as well as enterprise functionality at http://knime.com.
This node evaluates a (free-form) mathematical expression based on the values in a row. The computed results can be either appended as new column or be used to replace an input column. Available variables are the values in the corresponding row of the table (left list in the dialog). Commonly used functions are shown in the list "Mathematical Functions". There are also some constants available, such as pi (the ratio of the circumference of a circle to its diameter),e (the base of the natural logarithms), the total number of rows in the table, and some other column based constants (right list).
This node uses JEP, the Java Math Expression Parser.
0 | Any input data |
0 | Input data amended with math column. |