Bicubic (2D) interpolation for table double derivative wrt x and y (same as y and x) [SAME AS *_eval_deriv_xy but derivative formatting]. Throws error outside of table range.
function bicubic_eval_deriv_xy_alt extends TRANSFORM.Icons.Function; input String tablesPath "Path to interpolation tables. Format = '|x.csv|y.csv|z.csv|"; input Real x; input Real y; input Real dx; input Real dy; output Real z; end bicubic_eval_deriv_xy_alt;