Package edu.cmu.tetrad.data

Interface Covariances

public interface Covariances

Some comemon methods for the various covariance implementations.

Version:

$Id: $Id

Author:

Joseph D. Ramsey

Field Summary

Fields

Modifier and Type	Field	Description
static final long	serialVersionUID	Constant serialVersionUID=23L

Method Summary

Modifier and Type	Method	Description
double	covariance(int i, int j)	Returns the covariance at (i, j).
double[][]	getMatrix()	Returns the underlying covariance matrix.
double[][]	getSubMatrix(int[] rows, int[] cols)	Returns a submatrix of the covariance matrix for the given rows and columns.
void	setCovariance(int i, int j, double v)	Sets the covariance at (i, j) to a particular value.
int	size()	Returns the dimensiom of the matrix.

Field Details

serialVersionUID

static final long serialVersionUID

Constant serialVersionUID=23L

See Also:

• Constant Field Values

Method Details

covariance

double covariance(int i,
 int j)

Returns the covariance at (i, j).

Parameters:

i - a int

j - a int

Returns:

a double

size

int size()

Returns the dimensiom of the matrix.

Returns:

a int

setCovariance

void setCovariance(int i,
 int j,
 double v)

Sets the covariance at (i, j) to a particular value. Not effective for implemetations that calculate covariances from data on the fly.

Parameters:

i - a int

j - a int

v - a double

getMatrix

double[][] getMatrix()

Returns the underlying covariance matrix.

Returns:

an array of objects

getSubMatrix

double[][] getSubMatrix(int[] rows,
 int[] cols)

Returns a submatrix of the covariance matrix for the given rows and columns.

Parameters:

rows - an array of objects

cols - an array of objects

Returns:

an array of objects