All the results can be displayed and edited as figures ready for publication, using the powerful tools provided by Matlab. To display any field as an individual figure, outside the uvmat interface, change the number in the edit window 'visu window' on the left, for instance put 2 instead of 0. Then visualization takes place in this external figure. Several figures can be displayed simultaneously by selecting successive numbers: use only even numbers, the odd ones are reserved for histograms, also displayed in external figures.
For instance let us superpose velocity vectors to the vorticity field and display it in a subregion, as shown in fig. 3. After writing '2' in 'visu window', select 'vorticity' in the 'FIELDS' menu. Adjust the color scale by the 'min' and 'max' edit boxes on the top. Then select the check box '-' at the left of the file name to record the image name and display settings, then select 'velocity' in the 'FIELDS' menu. The velocity arrows appear, superimposed on the vorticity.
A subregion can be selected, using the zoom and drawing a rectangle. The figure can be edited using the standard tools of matlab. For instance to change the color of the vectors, select the arrow 'edit plot' on the top of the figure, and select one of the vectors with the right mouse: a menu appears, allowing to change the color. The figure can be also edited by the menu 'Edit/figure properties' on the menu bar of the figure. This gives access to a list of graphic objects, in particular lines, for which the properties can be edited (color, width.). Similarly, labels can be added, see the matlab help for graphics. Finally the figure can be saved and exported in various image format using the 'file' menu.
The displayed field is available in the matlab working directory, so any calculation can be performed on the fields. Type 'global A' on the matlab prompt to get the current image as the matrix A. Then type 'image(A)' to visualize the image by yourself (choose the color map by the menu 'Edit/colormap' in the menu bar at the top of the figure). To get the current velocity field, type 'global vec_X vec_Y vec_U vec_V' (vector positions and velocity components). Then type for instance 'quiver(vec_X, vec_Y, vec_U, vec_V)' to plot it by yourself.
