From the course: Introduction to Machine Learning with KNIME

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Creating new variables with Construct

Creating new variables with Construct - KNIME Tutorial

From the course: Introduction to Machine Learning with KNIME

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Creating new variables with Construct

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- [Instructor] Moving on to the math formula node. So this node is going to be just one example of many, many that we could do of the data construction task of the data preparation phase. We're going to proceed by adding a formula to our workflow. I've been on real world projects where I have hundreds of formulas like this, so if you've heard a lot of talk about so called feature engineering, you know, its basically the whole idea of creating new variables from the variables that you're starting with, although this is a very basic example, it essentially is an example of feature engineering, so let's give it a go. We want the math formula node. We'll hook that up, take a look. And again, you might be doing a lot of these but I'm just going to demonstrate a very simple one. I'm just going to take sales amount, divided by quantity. Now remember that we got that through the aggregation and that's precisely what makes this so common that we're starting with a tall data set, then we're…

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