/** Reads the examples into memory and permutes the order. Removes all old data rows first. */
public void readExamples(DataRowReader i, boolean permute, Random random) {
dataList.clear();
while (i.hasNext()) {
if (permute) {
if (random == null) {
random = new Random();
}
int index = random.nextInt(dataList.size() + 1);
dataList.add(index, i.next());
} else {
dataList.add(i.next());
}
}
}
public static MemoryExampleTable createCompleteCopy(ExampleTable oldTable) {
MemoryExampleTable table = new MemoryExampleTable(Arrays.asList(oldTable.getAttributes()));
DataRowReader reader = oldTable.getDataRowReader();
while (reader.hasNext()) {
DataRow dataRow = reader.next();
double[] newDataRowData = new double[oldTable.getNumberOfAttributes()];
for (int a = 0; a < oldTable.getNumberOfAttributes(); a++) {
Attribute attribute = oldTable.getAttribute(a);
if (attribute != null) {
newDataRowData[a] = dataRow.get(attribute);
} else {
newDataRowData[a] = Double.NaN;
}
}
table.addDataRow(new DoubleArrayDataRow(newDataRowData));
}
return table;
}
