matlab官方的arrow.m
ARROW(Start,Stop)drawsalinewithanarrowfromStarttoStop(pointsshouldbevectorsoflength2or3,ormatriceswith2or3columns),andreturnsthegraphicshandleofthearrow(s).Byitself,ARROWwillusethemousetoallowselection.
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亲测可用，完美解决问题！
亲测可用，挺好的！