Selection of low order pseudo-shapelets basis components, formed from outer products of the 1D functions as follows: H₁ (u)H₀(v) (bottom left), H₂(u)H₀(v) (bottom right), H₁(u)H₂(v) (top left), and H₂(u)H₂(v) (top right). Each pseudo-shapelet has been normalised by a different amount in order to better display the structure. Throughout this paper we make use of the cubehelix colour scheme introduced in Green (2011).