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What is the main purpose of the forget gate in an LSTM?

Practice Questions

Q1
What is the main purpose of the forget gate in an LSTM?
  1. To decide what information to keep from the previous cell state.
  2. To initialize the cell state.
  3. To output the final prediction.
  4. To control the input to the cell state.

Questions & Step-by-Step Solutions

What is the main purpose of the forget gate in an LSTM?
  • Step 1: Understand that an LSTM (Long Short-Term Memory) is a type of neural network used for processing sequences of data.
  • Step 2: Recognize that LSTMs have different parts, one of which is called the forget gate.
  • Step 3: Know that the forget gate looks at the previous cell state and decides what information is no longer needed.
  • Step 4: The forget gate uses a mathematical function to produce a value between 0 and 1 for each piece of information.
  • Step 5: A value of 0 means 'completely forget this information,' while a value of 1 means 'keep this information.'
  • Step 6: The main purpose of the forget gate is to help the LSTM focus on relevant information and ignore what is not useful.
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