Package jline.lib.kpctoolbox.basic

Class BasicUtils

java.lang.Object

jline.lib.kpctoolbox.basic.BasicUtils

public final class BasicUtils
extends Object

Basic utility functions for the KPC-Toolbox. Ported from MATLAB: matlab/lib/kpctoolbox/basic/

Method Summary

Modifier and Type	Method	Description
static Matrix	e(int n)	Creates a vector e(n) = [1, 1, ..., 1]^T used in matrix operations.
static Matrix	eye(int n)	Creates an identity matrix.
static int[]	logspacei(double a, double b, int points)	Generates logarithmically spaced integers in [a, b].
static int	maxpos(double[] v)	Finds the position of the maximum value in a vector.
static int[]	maxpos(double[] v, int n)	Finds the positions of the n largest values in a vector.
static int	minpos(double[] v)	Finds the position of the minimum value in a vector.
static int[]	minpos(double[] v, int n)	Finds the positions of the n smallest values in a vector.
static Matrix	ones(int n)	Creates a column vector of ones.
static SpectralDecomposition	spectd(Matrix A)	Computes the spectral decomposition of a matrix.
static Matrix	zeros(int m, int n)	Creates a zero matrix.

Methods inherited from class java.lang.Object

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

Method Details

minpos

public static int minpos(double[] v)

Finds the position of the minimum value in a vector.

minpos

public static int[] minpos(double[] v,
 int n)

Finds the positions of the n smallest values in a vector.

maxpos

public static int maxpos(double[] v)

Finds the position of the maximum value in a vector.

maxpos

public static int[] maxpos(double[] v,
 int n)

Finds the positions of the n largest values in a vector.

logspacei

public static int[] logspacei(double a,
 double b,
 int points)

Generates logarithmically spaced integers in [a, b].

spectd

public static SpectralDecomposition spectd(Matrix A)

Computes the spectral decomposition of a matrix. Returns eigenvalues, eigenvectors, and projectors.

ones

public static Matrix ones(int n)

Creates a column vector of ones.

e

public static Matrix e(int n)

Creates a vector e(n) = [1, 1, ..., 1]^T used in matrix operations.

eye

public static Matrix eye(int n)

Creates an identity matrix.

zeros

public static Matrix zeros(int m,
 int n)

Creates a zero matrix.