The input to qhull appears to be less than 3 dimensional, or a computation has overflowed.
Qhull could not construct a clearly convex simplex from points:
The center point is coplanar with a facet, or a vertex is coplanar with a neighboring facet. The maximum round off error for computing distances is 3.8e-15. The center point, facets and distances to the center point are as follows:
These points either have a maximum or minimum x-coordinate, or they maximize the determinant for k coordinates. Trial points are first selected from points that maximize a coordinate.
The min and max coordinates for each dimension are: 0: -0.8392 0.8928 difference= 1.732 1: -1.239 1.493 difference= 2.732 2: 0 2.732 difference= 2.732
If the input should be full dimensional, you have several options that may determine an initial simplex: - use 'QJ' to joggle the input and make it full dimensional - use 'QbB' to scale the points to the unit cube - use 'QR0' to randomly rotate the input for different maximum points - use 'Qs' to search all points for the initial simplex - use 'En' to specify a maximum roundoff error less than 3.8e-15. - trace execution with 'T3' to see the determinant for each point.
If the input is lower dimensional: - use 'QJ' to joggle the input and make it full dimensional - use 'Qbk:0Bk:0' to delete coordinate k from the input. You should pick the coordinate with the least range. The hull will have the correct topology. - determine the flat containing the points, rotate the points into a coordinate plane, and delete the other coordinates. - add one or more points to make the input full dimensional.
This is a Delaunay triangulation and the input is co-circular or co-spherical: - use 'Qz' to add a point "at infinity" (i.e., above the paraboloid) - or use 'QJ' to joggle the input and avoid co-circular data
Error in delaunayn (line 101) t = qhullmx(x', 'd ', opt);