行列同士を列方向で連結する
chainer.functions.hstackの使い方メモ
import chainer
import chainer.functions as F
import numpy as np
hoge = np.array([i for i in range(9)]).reshape(3,3)
"""
array([[0, 1, 2],
[3, 4, 5],
[6, 7, 8]])
(3, 3)
"""
hogehoge = np.array([i*i for i in range(9)]).reshape(3,3)
"""
array([[ 0, 1, 4],
[ 9, 16, 25],
[36, 49, 64]])
(3, 3)
"""
hogehogehoge = F.hstack((hoge, hogehoge))
"""
variable([[ 0 1 2 0 1 4]
[ 3 4 5 9 16 25]
[ 6 7 8 36 49 64]])
(3, 6)
"""