Polar-Contour-Gradient-Vector
Select X(θ)Y(r)Z columns or matrix data to create gradient vector plot (or quiver plot) overlay contour plot in polar coordinate.
Select required data.
Select Plot > Specialized : Polar Contour + Gradient Vector.
POLARCONTQUIVER.otpu POLARCONTQUIVERXYZ.otpu (Installed to the Origin program folder)
Polar Contour + Gradient Vector graph is a polar contour graph with a gradient θRAM vectors plot overlaying.
The X-Function plot_mquiver or plot_xyzquiver is used to create such graph, same as the graph Contour Line + Gradient Vector.