NCL如何画纵横坐标不等间隔分布的图？

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大家下午好，请教一个问题，NCL作图通常是画纵横坐标等间隔分布的图，那么在画不等间隔分布的图时，该如何操作？数据分布如下图，第一列的值当作x轴，第二列的值当作y轴，第三列是变量的值。我尝试了一下，把数据当成散点图来画，但是在插值时误差非常大，以致于失真。求教各位这里该如何操作？

0.738492733201267983E-02 5500000.00000000000 0.278795807172792336E-01
0.738485021253937075E-02 5750000.00000000000 0.709053341611544201E-02
0.738485021253937075E-02 5750000.00000000000 0.709053341611544201E-02
0.738485021253937075E-02 5750000.00000000000 0.709053341611544201E-02
0.738483906546942397E-02 6000000.00000000000 0.624171304771215589E-32
0.738483906546942397E-02 6000000.00000000000 0.624171304771215589E-32
0.738483906546942397E-02 6000000.00000000000 0.624171304771215589E-32
0.653432647779044525E-02 5500000.00000000000 0.210827891775337839E-01
0.653432647779044525E-02 5500000.00000000000 0.210827891775337839E-01
0.653432647779044525E-02 5500000.00000000000 0.210827891775337839E-01
0.653427390542656462E-02 5750000.00000000000 0.536195108558171381E-02
0.653427390542656462E-02 5750000.00000000000 0.536195108558171381E-02
0.653427390542656462E-02 5750000.00000000000 0.536195108558171381E-02
0.653426630641518007E-02 6000000.00000000000 0.472006570046992735E-32
0.653426630641518007E-02 6000000.00000000000 0.472006570046992735E-32
0.653426630641518007E-02 6000000.00000000000 0.472006570046992735E-32
0.832751484638226402E-02 5500000.00000000000 0.363906631434164629E-01
0.832751484638226402E-02 5500000.00000000000 0.363906631434164629E-01
0.832751484638226402E-02 5500000.00000000000 0.363906631434164629E-01
0.832740341075331909E-02 5750000.00000000000 0.925507934278837867E-02
0.832740341075331909E-02 5750000.00000000000 0.925507934278837867E-02
0.832740341075331909E-02 5750000.00000000000 0.925507934278837867E-02
0.832738730365641631E-02 6000000.00000000000 0.814713056995071619E-32
0.832738730365641631E-02 6000000.00000000000 0.814713056995071619E-32
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