• The objective of machine learning is to change the parameter values to alter what the AI is doing.
• The goal is to minimize the loss function between what the AI is shown and what it does.
• Data collection and Configuration are where the you can achieve different results depending on your objective.
• The parameter updates are a series of small steps down the loss curve until the minimum is reached.
• Multiple iterations may be required to reach the minimum.

1. Objective of machine learning: adjust parameters (0m3s)
2. AI agent performing a task (0m7s)
3. Gradient descent (8m32s)
4. Strategies to escape local optima (13m54s)
5. Training AI on a variety of tasks (36m24s)
6. Fixing imbalanced data sets (21m29s)
7. Early stopping, overfitting, and missing important data (31m30s)
8. Batch size and updates per epoch (45m54s)
9. Data Collection is more important than tuning hyperparameters (53m51s)
10. "Garbage in, garbage out" concept (57m1s)

• The episode teaches viewers how to recover their AI agent back to the platform.
• The host explains the concept of random initialization and how it impacts the model's intelligence.
• Viewers learn how to incrementally build their AI agent's skills.
• The episode offers tips on training movement by selecting an active opponent in Data Collection.
• The host shows viewers how to balance retaining previous memories and learning new skills for you AI.

1. To optimize recovery jumps to the platform, Data Collection should be turned on only while in the air ref 561s.
2. Moderate training is important to build skills incrementally ref 622s.
3. The AI needs to use raycasts to understand its environment ref 1201s
4. An active opponent (not the dummy) should be used sometimes to help the AI train to recover after being knock far away from the stage ref 309s.
5. Players can adjust distance and angle to better train their AI using the Action Recorder ref 2767s
6. Lambda can be dialed to find the right balance between remembering old information and learning new skills ref 3289s ref 2853s.

Highlights

• 🎮 The episode talks about combos and conditional probability of actions in the game.
• 🛡️ Proper use of the shield and the concept of conditional probability in AI training is explained.
• 🤖 The episode shows how to train an AI model to perform a specific combo by selecting the appropriate features.

1. Guppy explains how to use conditional probability to increase the probability of holding the shield button. ref 1:02
2. Action representation involves selecting a subset of features for the AI to focus on. ref 11:50
3. Using the action recorder to train the AI in specific situations. ref 23:39
4. Selecting fewer features reduces the probability of spurious correlation. ref 40:48
5. Focusing on weight can help train differently depending on the weight of the opponent. ref 45:42

Highlights

• 🤖 Guppy shows how to use interpolation to train an AI efficiently.
• 🤔 Guppy explains how the AI is able to learn what to do in between the two scenarios shown.
• 📈 Guppy uses a simplified example and some math to demonstrate how the concept of interpolation works.

1. Guppy explains how to use conditional probability to increase the probability of holding the shield button. ref 1:02
2. Action representation involves selecting a subset of features for the AI to focus on. ref 11:50
3. Using the action recorder to train the AI in specific situations. ref 23:39
4. Selecting fewer features reduces the probability of spurious correlation. ref 40:48
5. Focusing on weight can help train differently depending on the weight of the opponent. ref 45:42

Summary

Highlights

• 🥊 Lighter weights offer better mobility and recovery in the game.
• 🎮 Heavier weights have more knockback power but struggle with combo potential.
• 🏋️‍♀️ Positioning plays a crucial role, and lighter fighters should stay on the inside of their opponents.

1. 0023 Difference in weight and viability of different weight classes.

• 0256 Effects of weight on mobility, recovery, and jump height.
• 0717 Impact of weight on knockback and combo potential.
• 1108 Importance of positioning for lighter fighters.
• 1436 Training a light fighter for mid-air combos and following opponents.

Summary

Highlights

• 🛡️ The shield mechanic in the game has been improved, allowing players to use shields effectively by separating the shield action from directional inputs.
• ⚡ The charging attack, specifically the headbutt move, is now trainable in the AI. The speaker demonstrates how to train the AI to perform headbutts effectively.
• ⏲️ Future updates will include a timer system for shields and generalization of charging attacks to accommodate new moves.

1. 0000 - Introduction and explanation of the shield execution improvement
2. 0520 - Discussion on the bug affecting charging headbutts and its resolution
3. 1140 - Explanation of the neural network setup and its benefits
4. 1810 - Future plans for implementing a shield health timer and generalizing charging attacks
5. 2150 - Conclusion and invitation for questions

Summary

Highlights

• 🎮 Updates to the game include the ability to pick a banner for display and the introduction of a perfect shield.
• 🛡️ The perfect shield can bounce back projectiles or stun opponents when timed correctly.
• 🔄 Training AI to recover from underneath a platform involves collecting data based on platform positioning and using over sampling for better results.

1. [0047] Introduction to HUD banner customization and perfect shield mechanics.
2. [0417] Demonstrating the use of perfect shield against projectiles and hand-to-hand combat.
3. [0817] Training AI to recover from underneath a platform by recognizing empty spaces.
4. [1446] Explanation of using X and Y coordinates for positioning and potential limitations.
5. [1910] The importance of generalization in AI training and future game updates.

Summary

Highlights

• 🛡️ The presenter demonstrates their process of training shields in an AI fighter.
• 🔄 They assess the AI's performance and make adjustments along the way.
• ⚔️ The AI shows improvement in shield usage and performs well in battles.

1. [000] Introduction and overview of the AI's current abilities.
2. [535] Training shields The presenter's approach and method.
3. [1120] Assessing the AI's shield usage in simulation battles.
4. [1550] Refining recovery moves to improve the AI's performance.
5. [2110] Showcasing improved shield usage and battle performance.