Refer numpy functions to reduce maintenance costs
Refer numpy functions to reduce maintenance costs

wkentaro/chainer,hvy/chainer,chainer/chainer,ktnyt/chainer,keisuke-umezawa/chainer,okuta/chainer,wkentaro/chainer,niboshi/chainer,ktnyt/chainer,hvy/chainer,jnishi/chainer,keisuke-umezawa/chainer,okuta/chainer,chainer/chainer,ktnyt/chainer,okuta/chainer,keisuke-umezawa/chainer,jnishi/chainer,jnishi/chainer,wkentaro/chainer,pfnet/chainer,jnishi/chainer,chainer/chainer,chainer/chainer,wkentaro/chainer,hvy/chainer,keisuke-umezawa/chainer,okuta/chainer,ktnyt/chainer,tkerola/chainer,niboshi/chainer,niboshi/chainer,niboshi/chainer,hvy/chainer