torch.FloatTensor()生成的数据类型dtype大小

结论

torch.FloatTensor()默认生成32位浮点数，dtype 为 torch.float32 或 torch.float

验证

     >>> tensor = torch.FloatTensor([[1,2],[3,4]])
     >>> print tensor
             tensor([[1., 2.],
             [3., 4.]])
     >>> print tensor.dtype    
             torch.float32

官网各类tensor对应数据类型如下：

https://pytorch.org/docs/stable/tensors.html?highlight=torch%20floattensor

Data type	dtype	CPU tensor	GPU tensor
32-bit floating point	torch.float32 or torch.float	torch.FloatTensor	torch.cuda.FloatTensor
64-bit floating point	torch.float64 or torch.double	torch.DoubleTensor	torch.cuda.DoubleTensor
16-bit floating point 1	torch.float16 or torch.half	torch.HalfTensor	torch.cuda.HalfTensor
16-bit floating point 2	torch.bfloat16	torch.BFloat16Tensor	torch.cuda.BFloat16Tensor
32-bit complex	torch.complex32
64-bit complex	torch.complex64
128-bit complex	torch.complex128 or torch.cdouble
8-bit integer (unsigned)	torch.uint8	torch.ByteTensor	torch.cuda.ByteTensor
8-bit integer (signed)	torch.int8	torch.CharTensor	torch.cuda.CharTensor
16-bit integer (signed)	torch.int16 or torch.short	torch.ShortTensor	torch.cuda.ShortTensor
32-bit integer (signed)	torch.int32 or torch.int	torch.IntTensor	torch.cuda.IntTensor
64-bit integer (signed)	torch.int64 or torch.long	torch.LongTensor	torch.cuda.LongTensor
Boolean	torch.bool	torch.BoolTensor	torch.cuda.BoolTensor
quantized 8-bit integer (unsigned)	torch.quint8	torch.ByteTensor	/
quantized 8-bit integer (signed)	torch.qint8	torch.CharTensor	/
quantized 32-bit integer (signed)	torch.qfint32	torch.IntTensor	/
quantized 4-bit integer (unsigned) 3	torch.quint4x2	torch.ByteTensor	/