visual data is the right choice for scientific data visualization, can be used to create a graph of 2d, 3d, 4d regular or irregular data such as color map, contour map, vector plot, surface, delaunay triangle net, 3d contour map, 4d slice plot and 4d vector plot. it is affordable to scientists and engineers. features: * creating data graphs by the usage of regular data and irregular data. * creating vertex, grid and surface models in cartesian, cylindrical and spherical coordinate systems. * creating color map, contour plot, vector plot and 3d contour plot. * creating delaunay triangles based on irregular data. * texture and transparency of 3d surface. * creating 4d scatter plot, vector field and slices. * ability to edit graph interactively. * ability to copy and save graph as bitmap.