java.lang.Object
- Matrix

public class Matrix
extends java.lang.Object

Constructor Summary

Constructors
Constructor	Description
`Matrix(double[][] mat)`	Creates a matrix from a bidimensional array
`Matrix(java.io.InputStream is)`	Creates a matrix from an InputStream in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns.
`Matrix(java.io.Reader r)`	Creates a matrix from a Reader in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns.
`Matrix(Matrix toCopy)`	Creates a matrix from another Matrix

Method Summary

Modifier and Type	Method	Description
`boolean`	`equals(java.lang.Object mi)`	Tells if an Object is equal to this Matrix
`int`	`getColumnsNumber()`	Returns the number of columns of this Matrix
`double[][]`	`getMatrix()`	Gets the bidimensional array representing this Matrix
`int`	`getRowsNumber()`	Returns the number of rows of this Matrix
`static double[][]`	`identity(int n)`	Returns a bidimensional array containing an identity matrix
`static boolean`	`isRect(double[][] m)`	Tells if a bidimensional array is a rectangle
`void`	`load(java.io.InputStream is)`	Loads a matrix from an InputStream in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns.
`void`	`load(java.io.Reader r)`	Loads a matrix from an InputStream in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns.
`static void`	`main(java.lang.String[] ar)`
`static double[][]`	`nullMatrix(int n)`	Returns a bidimensional array containing a zero matrix
`static Matrix`	`one(int n)`	Returns the identity Matrix
`int`	`order()`	Returns the order of this Matrix if it is a square matrix
`static double[][]`	`pow(double[][] m, int n)`	Returns the n-th power of a bidimensional array.
`Matrix`	`pow(int n)`	Returns the Matrix that n-th power of this Matrix
`static double[][]`	`prod(double[][] m1, double[][] m2)`	Returns the cartesian product of two bidimensional arrays.
`Matrix`	`prod(Matrix mat)`	Returns the Matrix that is the cartesian product of this Matrix with another Matrix
`static double[][]`	`sum(double[][] m1, double[][] m2)`	Returns the sum of two bidimensional arrays.
`Matrix`	`sum(Matrix mat)`	Returns the Matrix that is the sum of this Matrix with another Matrix
`java.lang.String`	`toString()`	Returns a String representing this Matrix
`double`	`value(int i, int j)`	Gets the value of this Matrix at the given coordinates
`static Matrix`	`zero(int n)`	Returns the zero Matrix

Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Matrix
```
public Matrix(Matrix toCopy)
```
    Creates a matrix from another Matrix
    
    Parameters:
    
    toCopy - the Matrix to copy
  - Matrix
```
public Matrix(double[][] mat)
```
    Creates a matrix from a bidimensional array
    
    Parameters:
    
    mat - the bidimensional array
  - Matrix
```
public Matrix(java.io.InputStream is)
```
    Creates a matrix from an InputStream in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns. The following rows*columnes double values are the values of the Matrix
    
    Parameters:
    
    is - the InputStream
  - Matrix
```
public Matrix(java.io.Reader r)
```
    Creates a matrix from a Reader in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns. The following rows*columnes double values are the values of the Matrix
    
    Parameters:
    
    r - the Reader
- Method Detail
  - load
```
public void load(java.io.InputStream is)
```
    Loads a matrix from an InputStream in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns. The following rows*columnes double values are the values of the Matrix
    
    Parameters:
    
    is - the InputStream
  - load
```
public void load(java.io.Reader r)
```
    Loads a matrix from an InputStream in which the first integer value is the number of rows of the Matrix and the second integer value is the number of columns. The following rows*columnes double values are the values of the Matrix
    
    Parameters:
    
    r - the Reader
  - sum
```
public Matrix sum(Matrix mat)
```
    Returns the Matrix that is the sum of this Matrix with another Matrix
    
    Parameters:
    
    mat - the Matrix to sum
    
    Returns:
    
    the resulting sum Matrix
  - sum
```
public static double[][] sum(double[][] m1,
                             double[][] m2)
```
    Returns the sum of two bidimensional arrays.
    
    Parameters:
    
    m1 - the first bidimensional array
    
    m2 - the second bidimensional array
    
    Returns:
    
    the bidimensional array that is the sum of m1 and m2
  - isRect
```
public static boolean isRect(double[][] m)
```
    Tells if a bidimensional array is a rectangle
    
    Parameters:
    
    m - the bidimensional array
    
    Returns:
    
    true if the array is a rectangle, false otherwise
  - prod
```
public Matrix prod(Matrix mat)
```
    Returns the Matrix that is the cartesian product of this Matrix with another Matrix
    
    Parameters:
    
    mat - the Matrix to make the product with
    
    Returns:
    
    the resulting cartesian product Matrix
  - prod
```
public static double[][] prod(double[][] m1,
                              double[][] m2)
```
    Returns the cartesian product of two bidimensional arrays.
    
    Parameters:
    
    m1 - the first bidimensional array
    
    m2 - the second bidimensional array
    
    Returns:
    
    the bidimensional array that is the cartesian product of m1 and m2
  - pow
```
public Matrix pow(int n)
```
    Returns the Matrix that n-th power of this Matrix
    
    Parameters:
    
    n - the esponent of the power
    
    Returns:
    
    the resulting power Matrix
  - pow
```
public static double[][] pow(double[][] m,
                             int n)
```
    Returns the n-th power of a bidimensional array.
    
    Parameters:
    
    m - the first bidimensional array
    
    n - the esponent of the power
    
    Returns:
    
    the bidimensional array that is the elevation of m to the n-th power
  - getRowsNumber
```
public int getRowsNumber()
```
    Returns the number of rows of this Matrix
    
    Returns:
    
    the number of rows
  - getColumnsNumber
```
public int getColumnsNumber()
```
    Returns the number of columns of this Matrix
    
    Returns:
    
    the number of columns
  - order
```
public int order()
```
    Returns the order of this Matrix if it is a square matrix
    
    Returns:
    
    the order of this Matrix if it is a square matrix, -1 otherwise
  - value
```
public double value(int i,
                    int j)
```
    Gets the value of this Matrix at the given coordinates
    
    Parameters:
    
    i - the row index
    
    j - the column index
    
    Returns:
    
    the value at the given coordinates if they are correct, NaN otherwise
  - getMatrix
```
public double[][] getMatrix()
```
    Gets the bidimensional array representing this Matrix
    
    Returns:
    
    the bidimensional array
  - one
```
public static Matrix one(int n)
```
    Returns the identity Matrix
    
    Parameters:
    
    n - the order of the identity Matrix
    
    Returns:
    
    the identity Matrix
  - identity
```
public static double[][] identity(int n)
```
    Returns a bidimensional array containing an identity matrix
    
    Parameters:
    
    n - the order of the identity matrix
    
    Returns:
    
    the identity matrix bidimensional array
  - zero
```
public static Matrix zero(int n)
```
    Returns the zero Matrix
    
    Parameters:
    
    n - the order of the zero Matrix
    
    Returns:
    
    the zero Matrix
  - nullMatrix
```
public static double[][] nullMatrix(int n)
```
    Returns a bidimensional array containing a zero matrix
    
    Parameters:
    
    n - the order of the zero matrix
    
    Returns:
    
    the zero matrix bidimensional array
  - toString
```
public java.lang.String toString()
```
    Returns a String representing this Matrix
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    the String to represent this Matrix
  - equals
```
public boolean equals(java.lang.Object mi)
```
    Tells if an Object is equal to this Matrix
    
    Overrides:
    
    equals in class java.lang.Object
    
    Parameters:
    
    mi - the Object to compare
    
    Returns:
    
    true if mi is a Matrix with the same elements, false otherwise
  - main
```
public static void main(java.lang.String[] ar)
```

Class Matrix

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Matrix

Matrix

Matrix

Matrix

Method Detail

load

load

sum

sum

isRect

prod

prod

pow

pow

getRowsNumber

getColumnsNumber

order

value

getMatrix

one

identity

zero

nullMatrix

toString

equals

main