importmatplotlib.pyplotaspltimportnumpyasnpplt.style.use('_mpl-gallery-nogrid')# make data:X,Y=np.meshgrid([1,2,3,4],[1,2,3,4])angle=np.pi/180*np.array([[15.,30,35,45],[25.,40,55,60],[35.,50,65,75],[45.,60,75,90]])amplitude=np.array([[5,10,25,50],[10,15,30,60],[15,26,50,70],[20,45,80,100]])U=amplitude*np.sin(angle)V=amplitude*np.cos(angle)# plot:fig,ax=plt.subplots()ax.barbs(X,Y,U,V,barbcolor='C0',flagcolor='C0',length=7,linewidth=1.5)ax.set(xlim=(0,4.5),ylim=(0,4.5))plt.show()

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