Package jline.api.pfqn.ld

Class Ljd

java.lang.Object

jline.api.pfqn.ld.Ljd

public final class Ljd
extends Object

Method Summary

Modifier and Type	Method	Description
static Matrix	ljd_delinearize(int idx, Matrix cutoffs)	Inverse of ljd_linearize(jline.util.matrix.Matrix, jline.util.matrix.Matrix): the population vector behind an index.
static int	ljd_linearize(Matrix nvec, Matrix cutoffs)	Convert per-class population vector to linearized index (0-indexed).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

ljd_linearize

public static int ljd_linearize(Matrix nvec,
 Matrix cutoffs)

Convert per-class population vector to linearized index (0-indexed). idx = n1 + n2*(N1+1) + n3*(N1+1)*(N2+1) + ...

Parameters:

nvec - per-class population vector

cutoffs - per-class cutoffs [N1, N2, ..., NR]

Returns:

the linearized index

ljd_delinearize

public static Matrix ljd_delinearize(int idx,
 Matrix cutoffs)

Inverse of ljd_linearize(jline.util.matrix.Matrix, jline.util.matrix.Matrix): the population vector behind an index.

The forward map is a mixed-radix numeral with class k in radix (Nk+1), so the inverse is the digit-by-digit division that reads it back. It is what lets a caller walk a tabulated dependence in index order and still know which population each entry belongs to.

Parameters:

idx - 0-based linearized index

cutoffs - per-class population cutoffs

Returns:

the per-class population vector