Lessons from homework

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# Lessons from homework - PowerPoint PPT Presentation

Lessons from homework. Try the simplest thing first “Occam’s Razor”: Prefer the simplest hypothesis that fits the data Corresponds to the decision tree bias Shown to be useful empirically (various mostly unsatisfying philosophical justifications also exist) “Laziness” rule

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Presentation Transcript
Lessons from homework
• Try the simplest thing first
• “Occam’s Razor”: Prefer the simplest hypothesis that fits the data
• Corresponds to the decision tree bias
• Shown to be useful empirically (various mostly unsatisfying philosophical justifications also exist)
• “Laziness” rule
• If it works, you’re done
• If it doesn’t work, you learn how to proceed
• “Justify yourself” rule
• Your audience/boss/customer will resist a complex model unless you’ve shown simple ones are inadequate
This week
• Rule learning
• Evaluating hypotheses
• Homework #2 assigned later today
• Due 5:00PM October 23
• Shorter than last time
• Questions
• Which ML approaches? Why?
• How did you evaluate your system?
• Were you successful? Why or why not? What did/would you try next?