lua中奇葩用法
th> a=torch.zeros(1,5) [0.0001s] th> a 0 0 0 0 0 [torch.DoubleTensor of size 1x5] [0.0002s] th> a[1] 0 0 0 0 0 [torch.DoubleTensor of size 5]
th> a=torch.zeros(2,5) [0.0002s] th> a 0 0 0 0 0 0 0 0 0 0 [torch.DoubleTensor of size 2x5] [0.0003s] th> a[1] 0 0 0 0 0 [torch.DoubleTensor of size 5]