org.statcato.statistics.inferential

Class CrossTabulation

java.lang.Object

org.statcato.statistics.inferential.CrossTabulation

public class CrossTabulation
extends java.lang.Object

Cross tabulation and Chi-square test.

Since:

1.0

See Also:

ContingencyTable

Constructor Summary

Constructors

Constructor and Description
CrossTabulation(int a, int b) Constructor, given the number of rows and columns.

Method Summary

Modifier and Type	Method and Description
void	addObservation(int i, int j, double frequency) Adds the given frequency to the location at row i and column j.
void	computeChiSquare() Creates a contingency table object using the cross tabulation data.
double	getColumnSum(int j) Return the sum of the given column.
double	getColumnSumPercent(int i) Return the percent of the sum of the given column out of the total sum.
ContingencyTable	getContingencyTable() Returns the contingency table.
double	getFrequency(int i, int j) Returns the frequency at row i and column j.
double	getPercent(int i, int j) Returns the percent at row i and column j.
double	getRowSum(int i) Return the sum of the given row.
double	getRowSumPercent(int i) Return the percent of the sum of the given row out of the total sum.
double	getTotalSum() Return the total sum.

Methods inherited from class java.lang.Object

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

Constructor Detail

CrossTabulation

public CrossTabulation(int a,
                       int b)

Constructor, given the number of rows and columns.

Parameters:

a - number of rows

b - number of columns

Method Detail

addObservation

public void addObservation(int i,
                           int j,
                           double frequency)

Adds the given frequency to the location at row i and column j.

Parameters:

i - row index

j - column index

data - double array

getFrequency

public double getFrequency(int i,
                           int j)

Returns the frequency at row i and column j.

Parameters:

i - row index

j - column index

Returns:

frequency

getPercent

public double getPercent(int i,
                         int j)

Returns the percent at row i and column j.

Parameters:

i -

j -

Returns:

percent

getRowSum

public double getRowSum(int i)

Return the sum of the given row.

Parameters:

i - row index

Returns:

row sum

getRowSumPercent

public double getRowSumPercent(int i)

Return the percent of the sum of the given row out of the total sum.

Parameters:

i - row index

Returns:

row sum percent

getColumnSum

public double getColumnSum(int j)

Return the sum of the given column.

Parameters:

j - column index

Returns:

column sum

getColumnSumPercent

public double getColumnSumPercent(int i)

Return the percent of the sum of the given column out of the total sum.

Parameters:

i - column index

Returns:

column sum percent

getTotalSum

public double getTotalSum()

Return the total sum.

Returns:

total sum

computeChiSquare

public void computeChiSquare()

Creates a contingency table object using the cross tabulation data.

getContingencyTable

public ContingencyTable getContingencyTable()

Returns the contingency table.

Returns:

ContingencyTable object