:j ddlmZddlZddlmZddlmZddlmZmZddl m Z  ddedeed ee d efd Z ddedeed ed d ee d ef dZ y))OptionalN)Tensor)Literal) _check_input_reduce_distance_matrix) _safe_matmulxy zero_diagonalreturnct|||\}}}tj|dd}||jdz }tj|dd}||jdz }t ||}|r|j d|S)zCalculate the pairwise cosine similarity matrix. Args: x: tensor of shape ``[N,d]`` y: tensor of shape ``[M,d]`` zero_diagonal: determines if the diagonal of the distance matrix should be set to zero )pdimr)rtorchnorm unsqueezerfill_diagonal_)r r r rdistances |/home/mcse/projects/srt_converter/srt-converter-venv/lib/python3.12/site-packages/torchmetrics/functional/pairwise/cosine.py"_pairwise_cosine_similarity_updaters'q!];Aq- ::a1! $D DNN1 A ::a1! $D DNN1 AAq!H" O reduction)meansumnoneNc4t|||}t||S)anCalculate pairwise cosine similarity. .. math:: s_{cos}(x,y) = \frac{}{||x|| \cdot ||y||} = \frac{\sum_{d=1}^D x_d \cdot y_d }{\sqrt{\sum_{d=1}^D x_i^2} \cdot \sqrt{\sum_{d=1}^D y_i^2}} If both :math:`x` and :math:`y` are passed in, the calculation will be performed pairwise between the rows of :math:`x` and :math:`y`. If only :math:`x` is passed in, the calculation will be performed between the rows of :math:`x`. Args: x: Tensor with shape ``[N, d]`` y: Tensor with shape ``[M, d]``, optional reduction: reduction to apply along the last dimension. Choose between `'mean'`, `'sum'` (applied along column dimension) or `'none'`, `None` for no reduction zero_diagonal: if the diagonal of the distance matrix should be set to 0. If only :math:`x` is given this defaults to ``True`` else if :math:`y` is also given it defaults to ``False`` Returns: A ``[N,N]`` matrix of distances if only ``x`` is given, else a ``[N,M]`` matrix Example: >>> import torch >>> from torchmetrics.functional.pairwise import pairwise_cosine_similarity >>> x = torch.tensor([[2, 3], [3, 5], [5, 8]], dtype=torch.float32) >>> y = torch.tensor([[1, 0], [2, 1]], dtype=torch.float32) >>> pairwise_cosine_similarity(x, y) tensor([[0.5547, 0.8682], [0.5145, 0.8437], [0.5300, 0.8533]]) >>> pairwise_cosine_similarity(x) tensor([[0.0000, 0.9989, 0.9996], [0.9989, 0.0000, 0.9998], [0.9996, 0.9998, 0.0000]]) )rr)r r rr rs rpairwise_cosine_similarityr0s T2!Q FH "8Y 77r)NN)NNN)typingrrrtyping_extensionsr(torchmetrics.functional.pairwise.helpersrrtorchmetrics.utilities.computerboolrrrrr&s %Z7LP 6":B4. 46:$( +8 +8+823+8D> +8  +8r