tf.raw_ops.CumulativeLogsumexp

Compute the cumulative product of the tensor x along axis.

tf.raw_ops.CumulativeLogsumexp(
    x, axis, exclusive=False, reverse=False, name=None
)

By default, this op performs an inclusive cumulative log-sum-exp, which means that the first element of the input is identical to the first element of the output:

tf.math.cumulative_logsumexp([a, b, c])  # => [a, log(exp(a) + exp(b)), log(exp(a) + exp(b) + exp(c))]

By setting the exclusive kwarg to True, an exclusive cumulative log-sum-exp is performed instead:

tf.cumulative_logsumexp([a, b, c], exclusive=True)  # => [-inf, a, log(exp(a) * exp(b))]

Note that the neutral element of the log-sum-exp operation is -inf, however, for performance reasons, the minimal value representable by the floating point type is used instead.

By setting the reverse kwarg to True, the cumulative log-sum-exp is performed in the opposite direction.