【发布时间】：2020-12-04 16:31:53
【问题描述】：
我正在处理一个 Python 函数，它计算代表 XYZ 坐标的嵌套数组的所有元素的几何中心
def lig_center(nested_array_list):
a = numpy.array(nested_array_list)
mean = numpy.mean(a, axis=0)
return mean[0], mean[1], mean[2] # x, y, z
# input list
xyz= [[121.133, 146.696, 139.126], [121.207, 145.489, 138.437], [122.058, 145.337, 137.335], [121.972, 143.689, 136.593], [123.209, 143.616, 135.31], [124.536, 143.881, 135.697], [124.87, 145.234, 135.928], [126.179, 145.569, 136.301], [127.156, 144.591, 136.455], [126.838, 143.258, 136.229], [123.824, 146.34, 135.736], [125.543, 142.913, 135.853], [123.008, 142.449, 134.454], [120.662, 143.598, 135.938], [122.362, 142.722, 137.625], [122.857, 146.427, 136.913], [122.764, 147.633, 137.625], [121.914, 147.77, 138.718], [123.101, 146.373, 134.374], [122.534, 147.208, 134.333], [122.482, 145.576, 134.33], [124.016, 146.346, 133.138], [125.066, 147.46, 133.272], [124.449, 148.847, 133.177], [123.972, 149.313, 131.947], [123.409, 150.582, 131.856], [123.322, 151.385, 132.993], [123.796, 150.925, 134.221], [124.36, 149.655, 134.314], [122.769, 152.634, 132.905], [123.339, 153.323, 133.255]]
# calculate geonetrical center of each element of xyz
col=lig_center(xyz)
# result"(123.51000000000001, 146.66999999999999, 135.30000000000001)
如何获得以下格式的 col 结果：
# just three float numbers with fixed number of digits after .
123.510 146.669 135.300
【问题讨论】：
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1.阅读“每个程序员都应该了解的浮点数知识”。 2.通过在输出时格式化数字来处理这个问题，指定3位数字，你会得到你想要的效果。
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我可以直接从函数 #print("[%.3f, %.3f, %.3f]" % tuple(mean)) 打印它但我需要将它保存在返回的变量中脚本
标签： python numpy floating-point