python - 连接具有不同第一维的二维数组

Question

我有三个numpy数组，分别有shape:

x1 = (30, 17437)
x2 = (30, 24131)
x3 = (30, 19782)

我想连接它们并创建一个尺寸为 (30, 61350) 的 numpy 数组。我试过了

labels = np.concatenate((x1, x2, x3))

但我得到了错误:

all the input array dimensions for the concatenation axis must match exactly, but along dimension 1, the array at index 0 has size 17437 and the array at index 1 has size 24131

Answer 1

如下图所示:

labels = np.array([x1[0], (x1[1] + x2[1] + x3[1])])
print(labels)

输出:

[   30 61350]