IntArray2D [from smile] [1026089]

/*******************************************************************************
 * Copyright (c) 2010-2019 Haifeng Li
 *
 * Smile is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * Smile is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Smile.  If not, see <https://www.gnu.org/licenses/>.
 *******************************************************************************/

sclass IntArray2D implements IIntArray2D {
  private int[] A;
  private int nrows;
  private int ncols;

  public IntArray2D(int[][] A) {
      this.nrows = A.length;
      this.ncols = A[0].length;
      this.A = new int[nrows*ncols];

      int pos = 0;
      for (int i = 0; i < nrows; i++) {
          System.arraycopy(A[i], 0, this.A, pos, ncols);
          pos += ncols;
      }
  }

  /**
   * Constructor of all-zero matrix.
   */
  public IntArray2D(int rows, int cols) {
      this.nrows = rows;
      this.ncols = cols;
      A = new int[rows*cols];
  }

  /**
   * Constructor. Fill the matrix with given value.
   */
  public IntArray2D(int rows, int cols, int value) {
      this(rows, cols);
      if (value != 0.0)
          Arrays.fill(A, value);
  }

  /**
   * Constructor.
   * @param value the array of matrix values arranged in row major format
   */
  public IntArray2D(int rows, int cols, int[] value) {
      this.nrows = rows;
      this.ncols = cols;
      this.A = value;
  }

  public int nrows() {
      return nrows;
  }

  public int ncols() {
      return ncols;
  }

  /** Returns A(i, j). Useful in Scala. */
  public int apply(int i, int j) {
      return A[i*ncols + j];
  }

  /** Returns A(i, j). */
  public int get(int i, int j) {
      return A[i*ncols + j];
  }

  /** Sets A(i, j). */
  public int set(int i, int j, int x) {
      return A[i*ncols + j] = x;
  }

  public int add(int i, int j, int x) {
      return A[i*ncols + j] += x;
  }

  public int sub(int i, int j, int x) {
      return A[i*ncols + j] -= x;
  }

  public int mul(int i, int j, int x) {
      return A[i*ncols + j] *= x;
  }

  public int div(int i, int j, int x) {
      return A[i*ncols + j] /= x;
  }

  public IntArray2D add(IntArray2D b) {
      if (nrows() != b.nrows() || ncols() != b.ncols()) {
          throw new IllegalArgumentException("Matrix is not of same size.");
      }

      for (int i = 0; i < A.length; i++) {
          A[i] += b.A[i];
      }
      return this;
  }

  public IntArray2D sub(IntArray2D b) {
      if (nrows() != b.nrows() || ncols() != b.ncols()) {
          throw new IllegalArgumentException("Matrix is not of same size.");
      }

      for (int i = 0; i < A.length; i++) {
          A[i] -= b.A[i];
      }
      return this;
  }

  public IntArray2D mul(IntArray2D b) {
      if (nrows() != b.nrows() || ncols() != b.ncols()) {
          throw new IllegalArgumentException("Matrix is not of same size.");
      }

      for (int i = 0; i < A.length; i++) {
          A[i] *= b.A[i];
      }
      return this;
  }

  public IntArray2D div(IntArray2D b) {
      if (nrows() != b.nrows() || ncols() != b.ncols()) {
          throw new IllegalArgumentException("Matrix is not of same size.");
      }

      for (int i = 0; i < A.length; i++) {
          A[i] /= b.A[i];
      }
      return this;
  }

  public IntArray2D add(int x) {
      for (int i = 0; i < A.length; i++) {
          A[i] += x;
      }

      return this;
  }

  public IntArray2D sub(int x) {
      for (int i = 0; i < A.length; i++) {
          A[i] -= x;
      }

      return this;
  }

  public IntArray2D mul(int x) {
      for (int i = 0; i < A.length; i++) {
          A[i] *= x;
      }

      return this;
  }

  public IntArray2D div(int x) {
      for (int i = 0; i < A.length; i++) {
          A[i] /= x;
      }

      return this;
  }

  public long sum() {
      long s = 0;
      for (int i = 0; i < A.length; i++) {
          s += A[i];
      }

      return s;
  }

  @Override
  public String toString() {
      return toString(false);
  }

  /**
   * Returns the string representation of matrix.
   * @param full Print the full matrix if true. Otherwise,
   *             print only top left 7 x 7 submatrix.
   */
  public String toString(boolean full) {
      return full ? toString(nrows(), ncols()) : toString(7, 7);
  }

  /**
   * Returns the string representation of matrix.
   * @param m the number of rows to print.
   * @param n the number of columns to print.
   */
  public String toString(int m, int n) {
      StringBuilder sb = new StringBuilder();
      m = Math.min(m, nrows());
      n = Math.min(n, ncols());

      String newline = n < ncols() ? "...\n" : "\n";

      for (int i = 0; i < m; i++) {
          for (int j = 0; j < n; j++) {
              sb.append(String.format("%d  ", get(i, j)));
          }
          sb.append(newline);
      }

      if (m < nrows()) {
          sb.append("  ...\n");
      }

      return sb.toString();
  }
}

Travelled to 6 computer(s): bhatertpkbcr, mqqgnosmbjvj, pyentgdyhuwx, pzhvpgtvlbxg, tvejysmllsmz, vouqrxazstgt

Snippet ID:	#1026089
Snippet name:	IntArray2D [from smile]
Eternal ID of this version:	#1026089/2
Text MD5:	a87701d367d7063ca728200298cab77f
Transpilation MD5:	ba51f90ea4092c6b4ef9d14a3ad57962
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2019-11-27 02:38:18
Source code size:	5598 bytes / 226 lines
Pitched / IR pitched:	No / No
Views / Downloads:	250 / 630
Version history:	1 change(s)
Referenced in:	[show references]

< > BotCompany Repo | #1026089 // IntArray2D [from smile]

JavaX fragment (include) [tags: use-pretranspiled]

1	/*******************************************************************************
2	* Copyright (c) 2010-2019 Haifeng Li
3	*
4	* Smile is free software: you can redistribute it and/or modify
5	* it under the terms of the GNU Lesser General Public License as
6	* published by the Free Software Foundation, either version 3 of
7	* the License, or (at your option) any later version.
8	*
9	* Smile is distributed in the hope that it will be useful,
10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12	* GNU Lesser General Public License for more details.
13	*
14	* You should have received a copy of the GNU Lesser General Public License
15	* along with Smile. If not, see <https://www.gnu.org/licenses/>.
16	*******************************************************************************/
17
18	sclass IntArray2D implements IIntArray2D {
19	private int[] A;
20	private int nrows;
21	private int ncols;
22
23	public IntArray2D(int[][] A) {
24	this.nrows = A.length;
25	this.ncols = A[0].length;
26	this.A = new int[nrows*ncols];
27
28	int pos = 0;
29	for (int i = 0; i < nrows; i++) {
30	System.arraycopy(A[i], 0, this.A, pos, ncols);
31	pos += ncols;
32	}
33	}
34
35	/**
36	* Constructor of all-zero matrix.
37	*/
38	public IntArray2D(int rows, int cols) {
39	this.nrows = rows;
40	this.ncols = cols;
41	A = new int[rows*cols];
42	}
43
44	/**
45	* Constructor. Fill the matrix with given value.
46	*/
47	public IntArray2D(int rows, int cols, int value) {
48	this(rows, cols);
49	if (value != 0.0)
50	Arrays.fill(A, value);
51	}
52
53	/**
54	* Constructor.
55	* @param value the array of matrix values arranged in row major format
56	*/
57	public IntArray2D(int rows, int cols, int[] value) {
58	this.nrows = rows;
59	this.ncols = cols;
60	this.A = value;
61	}
62
63	public int nrows() {
64	return nrows;
65	}
66
67	public int ncols() {
68	return ncols;
69	}
70
71	/** Returns A(i, j). Useful in Scala. */
72	public int apply(int i, int j) {
73	return A[i*ncols + j];
74	}
75
76	/** Returns A(i, j). */
77	public int get(int i, int j) {
78	return A[i*ncols + j];
79	}
80
81	/** Sets A(i, j). */
82	public int set(int i, int j, int x) {
83	return A[i*ncols + j] = x;
84	}
85
86	public int add(int i, int j, int x) {
87	return A[i*ncols + j] += x;
88	}
89
90	public int sub(int i, int j, int x) {
91	return A[i*ncols + j] -= x;
92	}
93
94	public int mul(int i, int j, int x) {
95	return A[incols + j] = x;
96	}
97
98	public int div(int i, int j, int x) {
99	return A[i*ncols + j] /= x;
100	}
101
102	public IntArray2D add(IntArray2D b) {
103	if (nrows() != b.nrows() \|\| ncols() != b.ncols()) {
104	throw new IllegalArgumentException("Matrix is not of same size.");
105	}
106
107	for (int i = 0; i < A.length; i++) {
108	A[i] += b.A[i];
109	}
110	return this;
111	}
112
113	public IntArray2D sub(IntArray2D b) {
114	if (nrows() != b.nrows() \|\| ncols() != b.ncols()) {
115	throw new IllegalArgumentException("Matrix is not of same size.");
116	}
117
118	for (int i = 0; i < A.length; i++) {
119	A[i] -= b.A[i];
120	}
121	return this;
122	}
123
124	public IntArray2D mul(IntArray2D b) {
125	if (nrows() != b.nrows() \|\| ncols() != b.ncols()) {
126	throw new IllegalArgumentException("Matrix is not of same size.");
127	}
128
129	for (int i = 0; i < A.length; i++) {
130	A[i] *= b.A[i];
131	}
132	return this;
133	}
134
135	public IntArray2D div(IntArray2D b) {
136	if (nrows() != b.nrows() \|\| ncols() != b.ncols()) {
137	throw new IllegalArgumentException("Matrix is not of same size.");
138	}
139
140	for (int i = 0; i < A.length; i++) {
141	A[i] /= b.A[i];
142	}
143	return this;
144	}
145
146	public IntArray2D add(int x) {
147	for (int i = 0; i < A.length; i++) {
148	A[i] += x;
149	}
150
151	return this;
152	}
153
154	public IntArray2D sub(int x) {
155	for (int i = 0; i < A.length; i++) {
156	A[i] -= x;
157	}
158
159	return this;
160	}
161
162	public IntArray2D mul(int x) {
163	for (int i = 0; i < A.length; i++) {
164	A[i] *= x;
165	}
166
167	return this;
168	}
169
170	public IntArray2D div(int x) {
171	for (int i = 0; i < A.length; i++) {
172	A[i] /= x;
173	}
174
175	return this;
176	}
177
178	public long sum() {
179	long s = 0;
180	for (int i = 0; i < A.length; i++) {
181	s += A[i];
182	}
183
184	return s;
185	}
186
187	@Override
188	public String toString() {
189	return toString(false);
190	}
191
192	/**
193	* Returns the string representation of matrix.
194	* @param full Print the full matrix if true. Otherwise,
195	* print only top left 7 x 7 submatrix.
196	*/
197	public String toString(boolean full) {
198	return full ? toString(nrows(), ncols()) : toString(7, 7);
199	}
200
201	/**
202	* Returns the string representation of matrix.
203	* @param m the number of rows to print.
204	* @param n the number of columns to print.
205	*/
206	public String toString(int m, int n) {
207	StringBuilder sb = new StringBuilder();
208	m = Math.min(m, nrows());
209	n = Math.min(n, ncols());
210
211	String newline = n < ncols() ? "...\n" : "\n";
212
213	for (int i = 0; i < m; i++) {
214	for (int j = 0; j < n; j++) {
215	sb.append(String.format("%d ", get(i, j)));
216	}
217	sb.append(newline);
218	}
219
220	if (m < nrows()) {
221	sb.append(" ...\n");
222	}
223
224	return sb.toString();
225	}
226	}