当然不是,只有当两个数组的trailing dimensions compatible时才会触发广播,否则报错ValueError: frames are not aligned exception。...axis: 0 1 2
a (3d array): 256 x 256 x 3
b (2d array): 256 x 3
a + b (2d array...x 3
a1 + b ValueError
失败转化
axis: 0 1 2 3
a2 (4d array): 256 x 256 x 1...3.np.bincount()
首先生成一个一维数组
x = np.array([1, 2, 3, 3, 0, 1, 4])
统计索引出现次数:索引0出现1次,1出现2次,2出现1次,3出现2次,4出现...In
np.around([1,2,5,6,56], decimals=-1)
Out
array([ 0, 0, 0, 10, 60])
发现没,当超过5时候(不包含5),才会进位!