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How to load String Array to RM? Java

kemoc

Hi,
I don't know how to load string vales to RM?

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Marco_Boeck

Hi,

please be more specific. I have absolutely no clue what you want to achieve.
But for starters, I'll just post a link that might be interesting to you

Click here.

Regards,
Marco

kemoc

Marco Boeck wrote:

Hi,

please be more specific. I have absolutely no clue what you want to achieve.
But for starters, I'll just post a link that might be interesting to you
...
Regards,
Marco

I would load to the RM data with String values from Java file, for example from Map<Integer, ArrayList<String>>, it represent a table.
com.rapidminer.example.set.* - accept only numeric values.

Marco_Boeck

Hi,

please consider loading the data via one of the RM operators in a process you designed. If for some reason that is not feasible, and you really need to do it programmatically, you could try using something along these lines:


MemoryExampleTable table = new MemoryExampleTable(copiedListOfAttributes);
double[] doubleArray = null;
[...]
for (int j=0; j<copiedListOfAttributes.size(); j++) {
	Attribute a = copiedListOfAttributes.get(j);
	value = rowList.get(j);
	// if numerical attribute
	if (a.isNumerical()) {
		// put it into the array
		if (value == null) {
			doubleArray = Double.NaN;
		} else {
			doubleArray = Double.parseDouble(value);
		}
	// non-numerical attribute
	} else {
		// special case: date attribute
		if (Ontology.ATTRIBUTE_VALUE_TYPE.isA(a.getValueType(), Ontology.DATE ) ||
			Ontology.ATTRIBUTE_VALUE_TYPE.isA(a.getValueType(), Ontology.DATE_TIME) ||
			Ontology.ATTRIBUTE_VALUE_TYPE.isA(a.getValueType(), Ontology.TIME)) {
			if (value == null) {
				doubleArray = Double.NaN;
			} else {
				doubleArray = Double.parseDouble(value);
			}
		} else {
			// create a new mapping (cleared earlier) if needed, add resulting index to array
			if (value == null) {
				doubleArray = Double.NaN;
			} else {
				doubleArray = a.getMapping().mapString(rowList.get(j));
			}
		}
	}
}
[...]
// add the double array for each row to the ExampleSet
table.addDataRow(new DoubleArrayDataRow(doubleArray));
// create example set
ExampleSet exSet = table.createExampleSet();

Regards,
Marco