/// <summary> Creates a new set of instances by copying a
/// subset of another set.
///
/// </summary>
/// <param name="source">the set of instances from which a subset
/// is to be created
/// </param>
/// <param name="first">the index of the first instance to be copied
/// </param>
/// <param name="toCopy">the number of instances to be copied
/// </param>
/// <exception cref="IllegalArgumentException">if first and toCopy are out of range
/// </exception>
//@ requires 0 <= first;
//@ requires 0 <= toCopy;
//@ requires first + toCopy <= source.numInstances();
public Instances(Instances source, int first, int toCopy):this(source, toCopy)
{
if ((first < 0) || ((first + toCopy) > source.numInstances()))
{
throw new System.ArgumentException("Parameters first and/or toCopy out " + "of range");
}
source.copyInstances(first, this, toCopy);
}
/// <summary> Constructor copying all instances and references to
/// the header information from the given set of instances.
///
/// </summary>
/// <param name="instances">the set to be copied
/// </param>
public Instances(Instances dataset):this(dataset, dataset.numInstances())
{
dataset.copyInstances(0, this, dataset.numInstances());
}
