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  • matplotlib 画图中图和次坐标轴

    一: fig.add_axes 画图中图

    fig = plt.figure()
        x = np.arange(1, 9, 1)
        y = np.linspace(1, 10, 8)
        left, bottom, width, height = 0.1, 0.1, 0.8, 0.8
        ax1 = fig.add_axes([left, bottom, width, height])
        ax1.plot(x, y, 'r')
        ax1.set_xlabel('x')
        ax1.set_ylabel('y')
        ax1.set_title('title')
    
        left, bottom, width, height = 0.2, 0.6, 0.25, 0.25
        ax2 = fig.add_axes([left, bottom, width, height])
        ax2.plot(y, x, 'b')
        ax2.set_xlabel('x')
        ax2.set_ylabel('y')
        ax2.set_title('title inside 1')
    
        left, bottom, width, height = 0.6, 0.2, 0.25, 0.25
        ax3 = fig.add_axes([left, bottom, width, height])
        ax3.plot(y, x, 'g')
        ax3.set_xlabel('x')
        ax3.set_ylabel('y')
        ax3.set_title('title inside 2')
        plt.savefig('./image_dir/tu1.png')
        plt.tight_layout()
        plt.show()

    二:次坐标轴

     1   
    x = np.arange(0, 10, 0.1)
     2     y1 = 0.5*x**2
     3     y2 = -1*x**2
     4     fig, ax1 = plt.subplots()
     5     ax2 = ax1.twinx()
     6     ax1.plot(x, y1, 'g-')
     7     ax2.plot(x, y2, 'b--')
     8     ax1.set_xlabel('X data')
     9     ax1.set_ylabel('Y1', color='g')
    10     ax2.set_ylabel('Y2', color='b')
    11     plt.savefig('./image_dir/xy.png')
    12     plt.tight_layout()
    13     plt.show()
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  • 原文地址:https://www.cnblogs.com/heguihui/p/12184810.html
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