X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fmath%2FMatrix.java;h=b39d3c91070fe4905561d1c1d36227e65534cc6f;hb=73f4373f0ad3d76ca36a32201d3ed53c255180c5;hp=aaeb8dab19de465a8ff14b6a988c106f4155096b;hpb=df1447b81289138e8bd0caaf7c7117ad71f74f29;p=jalview.git diff --git a/src/jalview/math/Matrix.java b/src/jalview/math/Matrix.java index aaeb8da..b39d3c9 100755 --- a/src/jalview/math/Matrix.java +++ b/src/jalview/math/Matrix.java @@ -65,7 +65,8 @@ public class Matrix implements MatrixI } /** - * Creates a new Matrix object. For example + * Creates a new Matrix object containing a copy of the supplied array values. + * For example * *
* new Matrix(new double[][] {{2, 3, 4}, {5, 6, 7}) @@ -85,13 +86,27 @@ public class Matrix implements MatrixI { this.rows = values.length; this.cols = this.rows == 0 ? 0 : values[0].length; - this.value = values; + + /* + * make a copy of the values array, for immutability + */ + this.value = new double[rows][]; + int i = 0; + for (double[] row : values) + { + if (row != null) + { + value[i] = new double[row.length]; + System.arraycopy(row, 0, value[i], 0, row.length); + } + i++; + } } /** * Returns a new matrix which is the transpose of this one * - * @return DOCUMENT ME! + * @return */ @Override public MatrixI transpose() @@ -957,4 +972,24 @@ public class Matrix implements MatrixI } } } + + /** + * Multiplies every entry in the matrix by the given value. + * + * @param + */ + @Override + public void multiply(double by) + { + for (double[] row : value) + { + if (row != null) + { + for (int i = 0; i < row.length; i++) + { + row[i] *= by; + } + } + } + } }