UJMP» Universal Java Matrix Package » Display a Matrix on the Screen

Display a Matrix on the Screen

admin — Sun, 09 Nov 2008 22:17:00 +0000

Every matrix can be visualized in a JFrame by invoking:

matrix.showGUI();

Import a Huge CSV Matrix

admin — Sun, 09 Nov 2008 21:38:33 +0000

If you have a very large CSV file, that is bigger than the available memory, you can link to the file instead of importing the data:

Matrix hugeMatrix = MatrixFactory.linkToFile(FileFormat.CSV, new File("VeryBigFile.csv"));

However, this matrix will be read-only.

Collections

admin — Thu, 09 Oct 2008 12:42:55 +0000

You can also create a ListMatrix instead of an ArrayList. A ListMatrix behaves like a java.List but is a Matrix at the same time:

ListMatrix S = new DefaultListMatrix();
// List methods:
S.add(0.5);
S.clear();
// Matrix methods:
S.exportToFile(someFile);
S.showGUI();
Matrix P = S.plus(5).times(2);
// but: P is not a ListMatrix anymore

The same works also for maps:

MapMatrix map = new DefaultMapMatrix(); map.put(key,o);

Create a sparse matrix

admin — Thu, 09 Oct 2008 10:42:41 +0000

Matrix m = MatrixFactory.sparse(10, 10);

Create empty matrices

admin — Thu, 09 Oct 2008 10:41:28 +0000

Matrix m = MatrixFactory.zeros(10, 10);