原 matplotlib散点scatter学习2，参数测试(marker1)

续上篇 绘制散点图的函数，x，y分别对应点的x轴坐标和y轴坐标 plt.scatter(x,y) matplotlib.pyplot.scatter(x, y, s=None, c=None, marker=None, cmap=None, norm=None, vmin=None, vmax=None, alpha=None, linewidths=None, verts=None, edgec

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