efield                  Electric field
geom_gradient_field     Create a Gradient Field Layer in ggplot2
geom_gradient_smooth    Create a Gradient Smoothed Field Layer
geom_potential          Compute and Plot Potential Function from a
                        Conservative Vector Field
geom_stream             Create a Streamline Plot Layer in ggplot2
geom_stream_field       Create a Stream Field Layer in ggplot2
geom_stream_smooth      Create a Smoothed Vector Field Layer
geom_vector             Vector Layers for ggplot2
geom_vector_field       Vector Field Layers for ggplot2
ggvfields               ggvfields: Vector Field Visualizations with
                        ggplot2
grid_hex                Generate a Hexagonal Lattice
scale_length_continuous
                        Create a Continuous Scale for Vector Length
