有没有一种快速的方法来“亚展平”或展平 numpy 数组中的一些第一个维度？
例如，给定一个 numpy 维度数组(50,100,25)，结果维度将是(5000,25)
(50,100,25)
(5000,25)
看看numpy.reshape。
>>> arr = numpy.zeros((50,100,25)) >>> arr.shape # (50, 100, 25) >>> new_arr = arr.reshape(5000,25) >>> new_arr.shape # (5000, 25) # One shape dimension can be -1. # In this case, the value is inferred from # the length of the array and remaining dimensions. >>> another_arr = arr.reshape(-1, arr.shape[-1]) >>> another_arr.shape # (5000, 25)
