Size of "a" vector

Course Q&A Deep Learning Specialization Sequence Models
1

From Recurrent Neural Network Model Video:

a_vect
a_vect1018×488 192 KB

I know the size of the X vector depends of the size of your dictionary, as it’s a one-hot index into the dictionary.
What would the size of the A vector be?
Is that up to the designer of the RNN?

2

It’s the number of previous states you want to remember. It’s a design choice.

You’ll see it in action in the Week 1 programming assignments.

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