$.TRACK_META            Get meta data in the current track
TRACK_META              Get meta data in the current track
cartesian_to_xy         Convert canvas coordinates to the data
                        coordinates
current_spiral          Get current spiral object
current_spiral_vp       Viewport name of current spiral
current_track_index     Current track index
get_track_data          Get meta-data of a track
horizon_legend          Legend for the horizon chart
is_in_track             Test whether points are in a track
n_tracks                Number of tracks
names.TRACK_META        Names of all supported meta data
phylo_to_dendrogram     Convert a phylo object to a dendrogram object
polar_to_cartesian      Convert polar coordinates to catersian
                        coordinates
print.TRACK_META        Print TRACK_META
set_current_track       Set current track
solve_theta_from_spiral_length
                        Get theta from given spiral lengths
spiral_arrow            Draw arrows in the spiral direction
spiral_axis             Draw axis along the spiral
spiral_bars             Add bars to a track
spiral_clear            Clear the spiral curve
spiral_dendrogram       Draw dendrogram
spiral_highlight        Highlight a section of the spiral
spiral_highlight_by_sector
                        Highlight a sector
spiral_horizon          Draw horizon chart along the spiral
spiral_info             Information of the current spiral
spiral_initialize       Initialize the spiral
spiral_initialize_by_gcoor
                        Initialize the spiral with genomic coordinates
spiral_initialize_by_time
                        Initialize the spiral from time objects
spiral_lines            Add lines to a track
spiral_opt              Global options
spiral_phylo            Draw phylogenetic tree
spiral_points           Add points to a track
spiral_polygon          Add polygons to a track
spiral_raster           Add image to a track
spiral_rect             Add rectangles to a track
spiral_segments         Add segments to a track
spiral_text             Add texts to a track
spiral_track            Add a new track or go to an existed track
spiral_xaxis            Draw axis along the spiral
spiral_yaxis            Draw y-axis
xy_to_cartesian         Convert data coordinates to the canvas
                        coordinates
xy_to_polar             Convert data coordinates to polar coordinates
