ExcelExampleSource unable to label data

e4gle

As in topic. Here is the code:

ExcelExampleSource trainingData = OperatorService
					.createOperator(ExcelExampleSource.class);
			trainingData.setParameter("excel_file", "audis_trainingData.xls");
			trainingData.setParameter("create_label", "true");
			trainingData.setParameter("label_column", "5");

I try to apply this data to a model, but:

com.rapidminer.operator.UserError: Input example set does not have a label attribute

How come?

land

Well,
probably, because there's no such parameter in the operator?

Greetings,
  Sebastian

e4gle

Apparently, but what is

ExcelExampleSource.PARAMETER_LABEL_COLUMN 

?

So how to load labeled data from an excel sheet?

e4gle

So how to load labeled data from an excel sheet?

Bump, really want to know what is the answer for that question.

land

Hi,
either use the configuration wizard or just load the data and insert another operator "set role" after this to identify the label attribute.

Greetings,
  Sebastian

e4gle

I thought of that before, but i simply can't find this operator. I know of it's presence in the actual RapidMiner program, but i can't find it in javadoc.

land

Hi,
because of historical reasons, the class names of the operators are not equivalent to the names inside the program. So if the operator  is called "Set Role" one would assume the class would be called "SetRoleOperator" and I really would like that, but unfortunately it is called "ChangeAttributeRole". If you want to match an operators name to a class, take a look in the OperatorsCore.xml in the resource directory of RapidMiner. There the matching is done.

Greetings,
  Sebastian

e4gle

That helped a lot, thanks