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Is there a supconloss function in pytorch?


Asked by King Schaefer on Dec 10, 2021 FAQ



The loss function SupConLoss in losses.py takes features (L2 normalized) and labels as input, and return the loss. If labels is None or not passed to the it, it degenerates to SimCLR.
Moreover,
Pytorch does not support this non-scalar function derivatives. Instead, pytorch assumes outis only an intermediate tensor and somewhere "upstream" there is a scalar loss function, that through chain rule provides d loss/ d out[i,j].
Additionally, By default, pytorch expects backward () to be called for the last output of the network - the loss function. The loss function always outputs a scalar and therefore, the gradients of the scalar loss w.r.t all other variables/parameters is well defined (using the chain rule). Thus, by default, backward () is called on a scalar tensor ...
One may also ask,
The function torch.cosh () provides support for the hyperbolic cosine function in PyTorch. It expects the input in radian form. The input type is tensor and if the input contains more than one element, element-wise hyperbolic cosine is computed. Return type: A tensor with the same type as that of x.
Next,
The parameters of the model are then updated by taking the derivative of the loss function. Intuitively, if your model is completely confident in its answer, and its answer is wrong, your loss will be high. If it is very confident in its answer, and its answer is correct, the loss will be low.