using a uniform prior distribution (lead to global basis functions) and a compactly supported prior distribution (lead
to compactly supported basis functions). In one dimension, individual basis functions or all the
basis functions on a grid can be displayed. Two-dimensional basis functions may be dislayed as
contour plots or surface plots. The plots are generated by dividing the polygonal element into
triangles and then dividing the triangles recursively. The user can calculate the value of the basis