tf.nn.sparse_softmax_cross_entropy_with_logits

View source on GitHub

Computes sparse softmax cross entropy between logits and labels.

tf.nn.sparse_softmax_cross_entropy_with_logits(
    labels, logits, name=None
)

Measures the probability error in discrete classification tasks in which the classes are mutually exclusive (each entry is in exactly one class). For example, each CIFAR-10 image is labeled with one and only one label: an image can be a dog or a truck, but not both.

NOTE: For this operation, the probability of a given label is considered exclusive. That is, soft classes are not allowed, and the labels vector must provide a single specific index for the true class for each row of logits (each minibatch entry). For soft softmax classification with a probability distribution for each entry, see softmax_cross_entropy_with_logits_v2.

WARNING: This op expects unscaled logits, since it performs a softmax on logits internally for efficiency. Do not call this op with the output of softmax, as it will produce incorrect results.

A common use case is to have logits of shape [batch_size, num_classes] and have labels of shape [batch_size], but higher dimensions are supported, in which case the dim-th dimension is assumed to be of size num_classes. logits must have the dtype of float16, float32, or float64, and labels must have the dtype of int32 or int64.

Note that to avoid confusion, it is required to pass only named arguments to this function.

Args:

Returns:

A Tensor of the same shape as labels and of the same type as logits with the softmax cross entropy loss.

Raises: