/// <summary> Returns the number of distinct values of a given attribute.
/// Returns the number of instances if the attribute is a
/// string attribute. The value 'missing' is not counted.
///
/// </summary>
/// <param name="att">the attribute
/// </param>
/// <returns> the number of distinct values of a given attribute
/// </returns>
public virtual int numDistinctValues(Attribute att)
{
return numDistinctValues(att.index());
}
/// <summary> Returns the kth-smallest attribute value of a numeric attribute.
/// Note that calling this method will change the order of the data!
///
/// </summary>
/// <param name="att">the Attribute object
/// </param>
/// <param name="k">the value of k
/// </param>
/// <returns> the kth-smallest value
/// </returns>
public virtual double kthSmallestValue(Attribute att, int k)
{
return kthSmallestValue(att.index(), k);
}
/// <summary> Returns the mean (mode) for a numeric (nominal) attribute as a
/// floating-point value. Returns 0 if the attribute is neither
/// nominal nor numeric. If all values are missing it returns zero.
///
/// </summary>
/// <param name="att">the attribute
/// </param>
/// <returns> the mean or the mode
/// </returns>
public virtual double meanOrMode(Attribute att)
{
return meanOrMode(att.index());
}
/// <summary> Removes all instances with missing values for a particular
/// attribute from the dataset.
///
/// </summary>
/// <param name="att">the attribute
/// </param>
public virtual void deleteWithMissing(Attribute att)
{
deleteWithMissing(att.index());
}
/// <summary> Computes the variance for a numeric attribute.
///
/// </summary>
/// <param name="att">the numeric attribute
/// </param>
/// <returns> the variance if the attribute is numeric
/// </returns>
/// <exception cref="IllegalArgumentException">if the attribute is not numeric
/// </exception>
public virtual double variance(Attribute att)
{
return variance(att.index());
}
/// <summary> Sorts the instances based on an attribute. For numeric attributes,
/// instances are sorted into ascending order. For nominal attributes,
/// instances are sorted based on the attribute label ordering
/// specified in the header. Instances with missing values for the
/// attribute are placed at the end of the dataset.
///
/// </summary>
/// <param name="att">the attribute
/// </param>
public virtual void sort(Attribute att)
{
sort(att.index());
}
/// <summary> Renames the value of a nominal (or string) attribute value. This
/// change only affects this dataset.
///
/// </summary>
/// <param name="att">the attribute
/// </param>
/// <param name="val">the value
/// </param>
/// <param name="name">the new name
/// </param>
public virtual void renameAttributeValue(Attribute att, System.String val, System.String name)
{
int v = att.indexOfValue(val);
if (v == - 1)
throw new System.ArgumentException(val + " not found");
renameAttributeValue(att.index(), v, name);
}
/// <summary> Renames an attribute. This change only affects this
/// dataset.
///
/// </summary>
/// <param name="att">the attribute
/// </param>
/// <param name="name">the new name
/// </param>
public virtual void renameAttribute(Attribute att, System.String name)
{
renameAttribute(att.index(), name);
}