nnf_multi_margin_loss function

Multi_margin_loss

Creates a criterion that optimizes a multi-class classification hinge loss (margin-based loss) between input x (a 2D mini-batch Tensor) and output y (which is a 1D tensor of target class indices, 0 <= y <= x$size(2) - 1 ).

nnf_multi_margin_loss(
  input,
  target,
  p = 1,
  margin = 1,
  weight = NULL,
  reduction = "mean"
)

Arguments

• input: tensor (N,*) where ** means, any number of additional dimensions
• target: tensor (N,*) , same shape as the input
• p: Has a default value of 1. 1 and 2 are the only supported values.
• margin: Has a default value of 1.
• weight: a manual rescaling weight given to each class. If given, it has to be a Tensor of size C. Otherwise, it is treated as if having all ones.
• reduction: (string, optional) – Specifies the reduction to apply to the output: 'none' | 'mean' | 'sum'. 'none': no reduction will be applied, 'mean': the sum of the output will be divided by the number of elements in the output, 'sum': the output will be summed. Default: 'mean'