Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

When evaluating derivatives, one always has a choice between forward and reverse mode. How does one decide which mode to use ?

April 26, 2017decide derivatives evaluating forward mode reverse

0

Posted

When evaluating derivatives, one always has a choice between forward and reverse mode. How does one decide which mode to use ?

1 Answer

0

Posted

In general, the best mode depends on the number of domain and range components in the function that your are differentiating. Each call to Forward computes the derivative of all the range directions with respect to one domain direction. Each call to Reverse computes the derivative of one range direction with respect to all the domain directions.