/**
* Sets the minimum and maximum values for each attribute in different arrays by walking through
* every DataObject of the database
*/
public void setMinMaxValues() {
attributeMinValues = new double[getInstances().numAttributes()];
attributeMaxValues = new double[getInstances().numAttributes()];
// Init
for (int i = 0; i < getInstances().numAttributes(); i++) {
attributeMinValues[i] = attributeMaxValues[i] = Double.NaN;
}
Iterator iterator = dataObjectIterator();
while (iterator.hasNext()) {
DataObject dataObject = (DataObject) iterator.next();
for (int j = 0; j < getInstances().numAttributes(); j++) {
if (Double.isNaN(attributeMinValues[j])) {
attributeMinValues[j] = dataObject.getInstance().value(j);
attributeMaxValues[j] = dataObject.getInstance().value(j);
} else {
if (dataObject.getInstance().value(j) < attributeMinValues[j])
attributeMinValues[j] = dataObject.getInstance().value(j);
if (dataObject.getInstance().value(j) > attributeMaxValues[j])
attributeMaxValues[j] = dataObject.getInstance().value(j);
}
}
}
}
