1 /*
2 * The baseCode project
3 *
4 * Copyright (c) 2006 University of British Columbia
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *
18 */
19 package ubic.basecode.dataStructure.matrix;
20
21 /**
22 * Use this class when fast iteration over the matrix is of primary interest. The primary change is that getQuick is
23 * faster, and toArray returns the actual elements, not a copy.
24 *
25 * @author pavlidis
26 *
27 */
28 public class DenseDoubleMatrix1D extends cern.colt.matrix.impl.DenseDoubleMatrix1D {
29
30 /**
31 *
32 */
33 private static final long serialVersionUID = -5196826500179433512L;
34
35 /**
36 * @param values
37 */
38 public DenseDoubleMatrix1D( double[] values ) {
39 super( values );
40 }
41
42 /**
43 * @param size
44 */
45 public DenseDoubleMatrix1D( int size ) {
46 super( size );
47 }
48
49 /**
50 * @param size
51 * @param elements
52 * @param zero
53 * @param stride
54 */
55 protected DenseDoubleMatrix1D( int size, double[] elements, int zero, int stride ) {
56 super( size, elements, zero, stride );
57 }
58
59 /**
60 * This is an optimized version of getQuick. Implementation note: the superclass uses an add and a multiply. This is
61 * faster, but there might be unforseen consequences...
62 *
63 * @see cern.colt.matrix.DoubleMatrix1D#getQuick(int)
64 */
65 @Override
66 public double getQuick( int i ) {
67 return elements[i];
68 }
69
70 /**
71 * WARNING unlike the superclass, this returns the actual underlying array, not a copy.
72 *
73 * @return the elements
74 * @see cern.colt.matrix.DoubleMatrix1D#toArray()
75 */
76 @Override
77 public double[] toArray() {
78 return elements;
79 }
80
81 }