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Added start of integer matrix
This commit is contained in:
455
src/main/java/com/mattrixwv/matrix/IntegerMatrix.java
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455
src/main/java/com/mattrixwv/matrix/IntegerMatrix.java
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//Matrix/src/main/java/com/mattrixwv/IntegerMatrix.java
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//Mattrixwv
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// Created: 02-01-22
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//Modified: 02-01-22
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package com.mattrixwv.matrix;
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import java.util.StringJoiner;
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import com.mattrixwv.matrix.exceptions.InvalidCoordinatesException;
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import com.mattrixwv.matrix.exceptions.InvalidGeometryException;
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import com.mattrixwv.matrix.exceptions.InvalidRowSizeException;
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public class IntegerMatrix{
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private int[][] grid;
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//Helper functions
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private void setGrid(int[][] grid){
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if(grid.length == 0){
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grid = new int[0][0];
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}
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else if(grid[0].length == 0){
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grid = new int[grid.length][0];
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}
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else{
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//Make sure all rows are the same length
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int length = grid[0].length;
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for(int cnt = 1;cnt < grid.length;++cnt){
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if(grid[cnt].length != length){
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throw new InvalidRowSizeException("All rows in a matrix must be the same size");
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}
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}
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//Copy every element over to a new grid
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int[][] newGrid = new int[grid.length][grid[0].length];
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for(int rowCnt = 0;rowCnt < grid.length;++rowCnt){
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for(int colCnt = 0;colCnt < grid[0].length;++colCnt){
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newGrid[rowCnt][colCnt] = grid[rowCnt][colCnt];
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}
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}
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//Save the new grid
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this.grid = newGrid;
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}
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}
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private int[][] copyGrid(){
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//Allocate memory for the new grid
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int[][] newGrid = new int[grid.length][grid[0].length];
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//Copy every element from the current grid to the new one
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for(int row = 0;row < grid.length;++row){
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for(int col = 0;col < grid[0].length;++col){
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newGrid[row][col] = grid[row][col];
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}
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}
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//Return the new grid
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return newGrid;
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}
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//Constructors
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public IntegerMatrix(){
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grid = new int[0][0];
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}
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public IntegerMatrix(int[][]grid){
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setGrid(grid);
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}
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public IntegerMatrix(IntegerMatrix matrix){
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setGrid(matrix.grid);
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}
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//Gets
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public int get(int row, int col){
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//Make sure the row and column are valid
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if(row >= grid.length){
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throw new InvalidCoordinatesException("Row cannot be greater than the number of rows");
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}
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else if(col >= grid[0].length){
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throw new InvalidCoordinatesException("Column cannot be greater than the number of columns");
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}
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//Return the location in the grid
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return grid[row][col];
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}
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public IntegerMatrix getRow(int row){
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//Make sure the row number is valid
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if((row < 0) || (row >= grid.length)){
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throw new InvalidCoordinatesException("The row number " + row + " is not valid");
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}
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//Generate a copy of the row
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int[][] newRow = new int[1][grid[row].length];
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for(int col = 0;col < grid[row].length;++col){
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newRow[0][col] = grid[row][col];
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}
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//Return the new matrix
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return new IntegerMatrix(newRow);
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}
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public int getNumRows(){
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return grid.length;
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}
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public IntegerMatrix getCol(int col){
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//Make sure the column number is valid
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if((col < 0) || (grid.length == 0) || (col > grid[0].length)){
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throw new InvalidCoordinatesException("The column number " + col + " is not valid");
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}
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//Generate a copy of the col
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int[][] newColumn = new int[grid.length][1];
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for(int row = 0;row < grid.length;++row){
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newColumn[row][0] = grid[row][col];
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}
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//Return the new matrix
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return new IntegerMatrix(newColumn);
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}
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public int getNumCols(){
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if(grid.length > 0){
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return grid[0].length;
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}
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else{
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return 0;
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}
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}
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//Sets
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public void set(int row, int col, int value){
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//Make sure the row number is valid
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if((row < 0) || (row >= grid.length)){
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throw new InvalidCoordinatesException("Invalid row number " + row);
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}
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//Make sure the column number is valid
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if((col < 0) || (col >= getNumCols())){
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throw new InvalidCoordinatesException("Invalid column number " + col);
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}
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//Save the element
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grid[row][col] = value;
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}
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public void setRow(int row, int[] elements){
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//Make sure the row number is valid
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if((row < 0) || (row >= grid.length)){
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throw new InvalidCoordinatesException("Invalid row number " + row);
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}
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//Make sure the number of elements is valid
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if(elements.length != getNumCols()){
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throw new InvalidGeometryException("Invalid number of elements " + elements.length + " must be " + getNumCols());
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}
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//Save the elements
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for(int col = 0;col < elements.length;++col){
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grid[row][col] = elements[col];
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}
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}
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public void setCol(int col, int[] elements){
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//Make sure the column number is valid
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if((col < 0) || (col >= getNumCols())){
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throw new InvalidCoordinatesException("Invalid column number " + col);
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}
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//Make sure the number of elements is valid
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if(elements.length != grid.length){
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throw new InvalidCoordinatesException("Invalid number of elements " + elements.length + " must be " + grid.length);
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}
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//Save the elements
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for(int row = 0;row < elements.length;++row){
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grid[row][col] = elements[row];
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}
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}
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//Adds
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public void addRow(int[] elements){
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//Make sure the number of columns is valid
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if((grid.length == 0) || (getNumCols() == elements.length)){
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int[][] newGrid = new int[grid.length + 1][elements.length];
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//Copy all existing data into the new grid
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for(int row = 0;row < grid.length;++row){
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newGrid[row] = grid[row];
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}
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grid = newGrid;
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}
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else{
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throw new InvalidGeometryException("Invalid number of elements " + elements.length + " must be " + getNumCols());
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}
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//Add all elements to the grid
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for(int col = 0;col < elements.length;++col){
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grid[grid.length - 1][col] = elements[col];
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}
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}
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public void addCol(int[] elements){
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//Make sure the number of rows is valid
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if(grid.length == 0){
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grid = new int[1][elements.length];
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}
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else if(grid.length == elements.length){
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//Copy all existing data into the new grid
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for(int row = 0;row < grid.length;++row){
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int[] workingRow = new int[grid[0].length + 1];
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for(int workingCol = 0;workingCol < grid[0].length;++workingCol){
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workingRow[workingCol] = grid[row][workingCol];
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}
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grid[row] = workingRow;
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}
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}
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else{
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throw new InvalidGeometryException("Invalid number of elements " + elements.length + " must be " + getNumCols());
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}
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//Add all elements to the grid
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for(int row = 0;row < elements.length;++row){
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grid[row][grid[row].length - 1] = elements[row];
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}
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}
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//Simple operations
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public static IntegerMatrix generateIdentity(int size){
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//Make sure the size is valid
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if(size > 0){
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//Create a grid with the correct size
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int[][] newGrid = new int[size][size];
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//Go through every element and make sure it is set correctly
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for(int row = 0;row < size;++row){
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for(int col = 0;col < size;++col){
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if(col == row){
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newGrid[row][col] = 1;
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}
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else{
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newGrid[row][col] = 0;
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}
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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else{
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throw new InvalidGeometryException("An identity matrix must have a size > 0");
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}
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}
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public static IntegerMatrix generateFilled(int size, int fill){
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//Create a grid with the correct size
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int[][] newGrid = new int[size][size];
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//Set each element in the grid
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for(int row = 0;row < size;++row){
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for(int col = 0;col < size;++col){
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newGrid[row][col] = fill;
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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public IntegerMatrix add(IntegerMatrix rightSide){
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//Make sure the matrices have compatable geometry
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if((getNumRows() != rightSide.getNumRows()) || (getNumCols() != rightSide.getNumCols())){
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throw new InvalidGeometryException("Both matrices must have the same number of rows and columns: " + getNumRows() + "x" + getNumCols() + " + " + rightSide.getNumRows() + "x" + rightSide.getNumCols());
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}
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//Create a new grid with the same elements as the current grid
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int[][] newGrid = copyGrid();
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//Add each element in the righ tmatrix to the corresponding element in the left matrix
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for(int row = 0;row < newGrid.length;++row){
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for(int col = 0;col < newGrid[0].length;++col){
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newGrid[row][col] += rightSide.grid[row][col];
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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public IntegerMatrix add(int scalar){
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//Create a new grid with the same elements as the current grid
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int[][] newGrid = copyGrid();
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//Add the scalar to each element in the grid
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for(int row = 0;row < newGrid.length;++row){
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for(int col = 0;col < newGrid[0].length;++col){
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newGrid[row][col] += scalar;
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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public IntegerMatrix subtract(IntegerMatrix rightSide){
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//Make sure the matrices have compatable geometry
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if((getNumRows() != rightSide.getNumRows()) || (getNumCols() != rightSide.getNumCols())){
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throw new InvalidGeometryException("Both matrices must have the same number of rows and columsn: " + getNumRows() + "x" + getNumCols() + " + " + rightSide.getNumRows() + "x" + rightSide.getNumCols());
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}
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//Create a new grid with the same elements as the current gird
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int[][] newGrid = copyGrid();
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//Subtract each element in the righ tmatrix from the corresponding element in the left matrix
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for(int row = 0;row < newGrid.length;++row){
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for(int col = 0;col < newGrid[0].length;++col){
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newGrid[row][col] -= grid[row][col];
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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public IntegerMatrix subtract(int scalar){
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//Create a new grid with the same elements as the current grid
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int[][] newGrid = copyGrid();
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//Subtract the scalar from each element in the grid
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for(int row = 0;row < newGrid.length;++row){
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for(int col = 0;col < newGrid[0].length;++col){
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newGrid[row][col] -= scalar;
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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public IntegerMatrix multiply(IntegerMatrix rightSide){
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//Make sure the matrices have compatable geometry
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if(getNumCols() != rightSide.getNumRows()){
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throw new InvalidGeometryException("The left matrix must have the same number of columns as the right matrix has rows: " + getNumRows() + "x" + getNumCols() + " + " + rightSide.getNumRows() + "x" + rightSide.getNumCols());
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}
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//Create a new grid with the same elements as the current grid
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int[][] newGrid = new int[getNumRows()][rightSide.getNumCols()];
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//Multiply each row in the left matrix with each column int he right matrix to come up with the current element
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for(int leftRow = 0;leftRow < grid.length;++leftRow){
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for(int rightCol = 0;rightCol < rightSide.getNumCols();++rightCol){
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//Get a sum of the product of each column in the current row (left) and each row in the current column (right)
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int elementProductSum = 0;
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for(int incrementCounter = 0;incrementCounter < grid.length;++incrementCounter){
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elementProductSum += grid[leftRow][incrementCounter] * rightSide.grid[incrementCounter][rightCol];
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}
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newGrid[leftRow][rightCol] = elementProductSum;
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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public IntegerMatrix multiply(int scalar){
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//Create a new grid with the same elements as the current grid
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int[][] newGrid = copyGrid();
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//Multiply every element in the grid by the scalar
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for(int row = 0;row < grid.length;++row){
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for(int col = 0;col < grid[0].length;++col){
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newGrid[row][col] *= scalar;
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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public int dotProduct(IntegerMatrix rightSide){
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//Make sure the matrices have compatable geometry
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if(getNumCols() != rightSide.getNumRows()){
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throw new InvalidGeometryException("The left matrix must have the same number of columns as the right matrix has rows: " + getNumRows() + "x" + getNumCols() + " + " + rightSide.getNumRows() + "x" + rightSide.getNumCols());
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}
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//Multiply each row in the left matrix with each column in the right matrix to come up with the current element
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//?Would be simpler, but slower, to get the product matrix to come up with the current element
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int sum = 0;
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for(int leftRow = 0;leftRow < grid.length;++leftRow){
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for(int rightCol = 0;rightCol < rightSide.getNumCols();++rightCol){
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for(int incrementCounter = 0;incrementCounter < grid.length;++incrementCounter){
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sum += grid[leftRow][incrementCounter] * rightSide.grid[incrementCounter][rightCol];
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}
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}
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}
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//Return the sum
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return sum;
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}
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public IntegerMatrix hadamardProduct(IntegerMatrix rightSide){
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//Make sure the matrices have compatable geometry
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if((getNumRows() != rightSide.getNumRows()) || (getNumCols() != rightSide.getNumCols())){
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throw new InvalidGeometryException("Both matrices must have the same number of rows and columns: " + getNumRows() + "x" + getNumCols() + " + " + rightSide.getNumRows() + "x" + rightSide.getNumCols());
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}
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//Create a new grid with the same element as the current grid
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int[][] newGrid = copyGrid();
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//Multiply each element in the right matrix to the corresponding element in the left matrix
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for(int row = 0;row < newGrid.length;++row){
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for(int col = 0;col < newGrid[0].length;++col){
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newGrid[row][col] *= rightSide.grid[row][col];
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}
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}
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//Return the new matrix
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return new IntegerMatrix(newGrid);
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}
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//Complex operations
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//Object funtions
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@Override
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public boolean equals(Object rightSide){
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if(rightSide.getClass().equals(this.getClass())){
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IntegerMatrix rightMatrix = (IntegerMatrix)rightSide;
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//Make sure they have the same number of elements
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if(grid.length != rightMatrix.grid.length){
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return false;
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}
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else if(getNumCols() != rightMatrix.getNumCols()){
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return false;
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}
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//Check every element
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for(int row = 0;row < grid.length;++row){
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for(int col = 0;col < grid[0].length;++col){
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if(grid[row][col] != rightMatrix.grid[row][col]){
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return false;
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}
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}
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}
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//If false hasn't been returned yet then they are equal
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return true;
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}
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else if(rightSide.getClass().equals(int[][].class)){
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int[][] rightMatrix = (int[][])rightSide;
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return equals(new IntegerMatrix(rightMatrix));
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}
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else{
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return false;
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}
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}
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@Override
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public String toString(){
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StringJoiner matrix = new StringJoiner("\n");
|
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for(int rowCnt = 0;rowCnt < grid.length;++rowCnt){
|
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StringJoiner row = new StringJoiner(",", "[", "]");
|
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for(int colCnt = 0;colCnt < grid[0].length;++colCnt){
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row.add(Integer.toString(grid[rowCnt][colCnt]));
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}
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matrix.add(row.toString());
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}
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return matrix.toString();
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}
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@Override
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public IntegerMatrix clone(){
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return new IntegerMatrix(grid);
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}
|
||||
}
|
||||
@@ -0,0 +1,21 @@
|
||||
//Matrix/src/main/java/com/mattrixwv/exceptions/InvalidCoordinates.java
|
||||
//Mattrixwv
|
||||
// Created: 02-01-22
|
||||
//Modified: 02-01-22
|
||||
package com.mattrixwv.matrix.exceptions;
|
||||
|
||||
|
||||
public class InvalidCoordinatesException extends RuntimeException{
|
||||
public InvalidCoordinatesException(){
|
||||
super();
|
||||
}
|
||||
public InvalidCoordinatesException(String message){
|
||||
super(message);
|
||||
}
|
||||
public InvalidCoordinatesException(Throwable throwable){
|
||||
super(throwable);
|
||||
}
|
||||
public InvalidCoordinatesException(String message, Throwable throwable){
|
||||
super(message, throwable);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,21 @@
|
||||
//Matrix/src/main/java/com/mattrixwv/exceptions/InvalidGeometryException.java
|
||||
//Mattrixwv
|
||||
// Created: 02-01-22
|
||||
//Modified: 02-02-22
|
||||
package com.mattrixwv.matrix.exceptions;
|
||||
|
||||
|
||||
public class InvalidGeometryException extends RuntimeException{
|
||||
public InvalidGeometryException(){
|
||||
super();
|
||||
}
|
||||
public InvalidGeometryException(String message){
|
||||
super(message);
|
||||
}
|
||||
public InvalidGeometryException(Throwable throwable){
|
||||
super(throwable);
|
||||
}
|
||||
public InvalidGeometryException(String message, Throwable throwable){
|
||||
super(message, throwable);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,21 @@
|
||||
//Matrix/src/main/java/com/mattrixwv/exceptions/InvalidRowSizeException.java
|
||||
//Mattrixwv
|
||||
// Created: 02-01-22
|
||||
//Modified: 02-01-22
|
||||
package com.mattrixwv.matrix.exceptions;
|
||||
|
||||
|
||||
public class InvalidRowSizeException extends RuntimeException{
|
||||
public InvalidRowSizeException(){
|
||||
super();
|
||||
}
|
||||
public InvalidRowSizeException(String message){
|
||||
super(message);
|
||||
}
|
||||
public InvalidRowSizeException(Throwable throwable){
|
||||
super(throwable);
|
||||
}
|
||||
public InvalidRowSizeException(String message, Throwable throwable){
|
||||
super(message, throwable);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user