Matrix Visualization Tool. This image shows the visualization application we implemented. It basically follows a zoomable user interface (ZUI) approach. (1,2): Overview images of the raw and weight matrix data using color coding. Histograms shown below allow interactive data selection. (5): options for selecting which matrix to show enlarged; selection from choice of color mapping schemes; application of sorting algorithm. Drawing a rectangle in either (1) oder (3) shows the selected matrix area enlarged in (4).