subsref

Evaluate the tensor spline with function-call syntax or defer to built-in indexing.

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Declaration

 varargout = subsref(self,index)

Parameters

• self TensorSpline instance
• index MATLAB subscript structure

Returns

• varargout indexed property access or spline values

Discussion

Function-call syntax is a thin wrapper around valueAtPoints(...). Use spline(X1,...,Xn) for pointwise values at matching-size query arrays. Paired column vectors evaluate paired sample locations, while matching ndgrid arrays evaluate a tensor-product lattice. For derivatives, use valueAtPoints(X1,...,Xn,D=...).

  values = spline(xq, yq);
  [Xq,Yq] = ndgrid(linspace(-1,1,40), linspace(0,2,50));
  F = spline(Xq, Yq);
  dFdx = spline.valueAtPoints(xq, yq, D=[1 0]);