Compute the moving average of a variable.

`k_moving_average_update(x, value, momentum)`

An operation to update the variable.

- x
A

`Variable`

.- value
A tensor with the same shape as

`x`

.- momentum
The moving average momentum.

This function is part of a set of Keras backend functions that enable lower level access to the core operations of the backend tensor engine (e.g. TensorFlow, CNTK, Theano, etc.).

You can see a list of all available backend functions here: https://tensorflow.rstudio.com/reference/keras/index.html#backend.