Polynomial Math Commands deconv Deconvolution of two vectors, or polynomial division. interp1 One dimensional interpolation. interp2 Two dimensional interpolation. isonormals Compute normal vectors to an interpolated isosurface. poly Polynomial construction, either as a characteristic polynomial, or from its roots.1.0.9 polyder Derivative of a polynomial. polyint Integral of a polynomial. polyval Evaluate a polynomial. roots Compute the roots of a polynomial. spline Interpolate (x,y) data with a cubic spline.