如何建立一个智能的一行计算非常大的数据？

Question

我为纬度（Xpos）和经度（Ypos）用维度（125,800,000）屏蔽了数组

我想计算数组中的经纬度差。这里是数组Xpos（Ypos类似）

 masked_array(  data       = [ [-2.0551843643188477, -2.637551784515381, -2.720881223678589,  ..., 2.2812530994415283, 2.281250476837158, 2.281254768371582 ],
                               [-2.3242127895355225, -2.804257869720459, -2.8825504779815674, ..., 2.2812530994415283, 2.281250476837158, 2.281254768371582 ],
                               [-2.073770523071289, -2.6198980808258057, -2.708889961242676,  ..., 2.2812530994415283, 2.281250476837158, 2.281254768371582 ],
                               ...,
                               [-3.517531633377075, -2.908338785171509, -2.9069409370422363,  ..., 2.2812530994415283, 2.281250476837158, 2.281254768371582 ],
                               [-3.688690662384033, -3.0086288452148438, -3.010164260864258,  ..., 2.2812530994415283, 2.281250476837158, 2.281254768371582 ],
                               [-3.520817518234253, -2.943941116333008, -2.941941738128662,   ..., 2.2812530994415283, 2.281250476837158, 2.281254768371582 ]
                               ],
                mask       = [ [ False, False, False, ..., False, False, False ],
                               [ False, False, False, ..., False, False, False],
                               [ False, False, False, ..., False, False, False],
                               ...,
                               [ False, False, False, ..., False, False, False],
                               [ False, False, False, ..., False, False, False],
                               [ False, False, False, ..., False, False, False]
                               ],
                fill_value = 1e+20,
                dtype      = float32
                )

---

这是我的代码，它可以工作，但需要很长的时间来计算

Dist= np.zeros((len(XposApr),len(XposApr[0])))
DiffLon=np.zeros((len(XposApr),len(XposApr[0])))
DiffLat=np.zeros((len(XposApr),len(XposApr[0])))
for i in range (1,len(XposApr),12):
    for j in range (0,len(XposApr[0])):
        DiffLon[i][j]=(XposApr[i][j]-XposApr[i-1][j])
        DiffLat[i][j]=(YposApr[i][j]-YposApr[i-1][j])

我真的不知道如何制作著名的单行线，这是我尝试过的，但不起作用：

DistLon = [XposApr[i][j]-XposApr[i-1][j] for i in enumerate (XposApr) and j in enumerate (XposApr[0])]

有没有可能生成一个线性或另一个代码，从而使计算速度大大加快？
提前谢谢

Answer 1

感谢您的回答和@patrick的有用评论，我相信这也可以解决我的问题：

Xapr=np.array(XposApr)
Yapr=np.array(YposApr)
for i in range (1,len(XposApr)):
    DiffLon[i]=(Xapr[i]-Xapr[i-1])
    DiffLat[i]=(Yapr[i]-Yapr[i-1])