Computes cumprod of x in logspace using cumsum to avoid underflow.
safe_cumprod(x, ...)
| x | Tensor to take the cumulative product of. |
|---|---|
| ... | Passed on to cumsum; these are identical to those in cumprod |
Cumulative product of x.
The cumprod function and its gradient can result in numerical instabilities when its argument has very small and/or zero values. As long as the argument is all positive, we can instead compute the cumulative product as exp(cumsum(log(x))). This function can be called identically to tf$cumprod.