What are data requirements for FP-Growth in Weka?

Question

I'd like to use FP-Growth association rule algorithm on my dataset (model) in Weka.

Unfortunately, this algorithm is greyed out. What are preconditions I have to meet in order to make use of it?

Why people are downgrading? C'mon, at least leave a comment... — ŁukaszBachman, Jan 12 '13 at 15:36

score 23 · Accepted Answer · edited Sep 21 '18 at 13:40

23

The answer/solution:

Each algorithm that Weka implements has some sort of a summary info associated with it. In order to see it from the GUI, one has to click on algorithm (or filter) options and then click once more on Capabilities button. Then a small popup will show up containing some info regarding particular algorithm.
In case of FPGrowth - model attributes needs to be of binary type. In my case I had a mix od nominal and numeric parameters. I had to apply NominalToBinary filter which converted my nominal attributes to binary values. Then I had to apply flter NumericToBinary with selected option ignoreClass set to true.

This has helped me to "unlock" FPGrowth in Weka.

edited Sep 21 '18 at 13:40

Stephen Kennedy

20,585
22
95
108

answered Jan 13 '13 at 15:37

ŁukaszBachman

33,595
11
64
74

3

Here's a slight longer explanation: "FP-Growth algorithm works for boolean values only. Hence, the attributes of the dataset can have only true or false values. If you are using different type of attributes (numeric, string etc.), it looks disabled." http://weka.8497.n7.nabble.com/FP-GROWTH-Algorithm-td23554.html – guerda Jun 14 '15 at 09:02

score 2 · Answer 2 · answered Nov 24 '17 at 03:38

Adding to @ŁukaszBachman answer: You need to set class to "No Class" before applying filter operation. If you are using weka java api, then you need to add data.setClassIndex(-1) to your java code.

For example: To perform Nominal To Binary in Java:

        NominalToBinary nn = new NominalToBinary();
        nn.setInputFormat(Data);
        Data.setClassIndex(-1);
        Data = Filter.useFilter(Data, nn);

What are data requirements for FP-Growth in Weka?

2 Answers2