DataGenerator Criteria for target function

gustavo_baldani

Hi everybody!!

I´m new in Datamaning and in RapidMiner too. xD

I want to know where can i see which criteria is taken to calculate the target funcion: simple polynomial classification in the DataGenerator operator.

Any help?

Thks!

awchisholm

Hello,

I had the same question and decided to look at the code to get the answer. To save you some time, you could look here

http://rapidminernotes.blogspot.com/2009/11/examplesetgenerator-parameters.html


regards

Andrew

gustavo_baldani

Andrew,

thks for replying.

I have seen that post, and it was very usefull. But...  Help me a little....

simple polynomial classification: label = "positive" if att1^4 > 100 otherwise "negative"

2 points:

- Its always that condition? I couldn´t find a relatsionship between my values and that binomial label (In my run).
- Where can i see that criteria "Here is a list (taken from the source code) " ? In wich part have you seen that?

Sorry for this basic question.

I have been working in BI the last 6 years, bue i´m new in DM and in RapidMiner.

I really like it.

Thks again.

awchisholm

Hello

Royal wedding here - not invited but mildly drunk anyway

I found this file

C:\Program Files\Rapid-I\RapidMiner5\src\com\rapidminer\operator\generator\SimplePolynomialClassificationFunction.java

and this code

public class SimplePolynomialClassificationFunction extends ClassificationFunction {

	public double calculate(double[] att) throws FunctionException {
		if (att.length < 1)
			throw new FunctionException("Simple polynomial classification function", "needs at least one attribute!");
		if ((att[0] * att[0] * att[0] * att[0]) > 100)
			return getLabel().getMapping().mapString("positive");
		else
			return getLabel().getMapping().mapString("negative");
	}
}

cheers!

Andrew

gustavo_baldani

Now yes!!

Thks a lot Andrew!

Best regards.