Join Keith McCormick for an in-depth discussion in this video Missing data, part of Machine Learning and AI Foundations: Classification Modeling.
- [Instructor] One of the themes that we've investigated…is certainly missing data.…Decision trees really are the exception to the rule.…Virtually all of the algorithms,…at least on default settings, operate by listwise deletion.…So, you really wanna be careful…about the following phenomenon.…In working with clients and building…my own models over many years,…I've noticed that when a client starts to say…that they're always having the best luck with trees,…I double check to see how many records…were actually processed by the other algorithms.…
And I can't tell you the number of times I've checked…and discovered that zero records were run by the neural net,…zero records were run…by the support vector machine, and so on.…And a lot of times they didn't realize this.…So if trees are consistently being the best performers,…you wanna make sure if the other algorithms…were even running properly.…Now if, perchance, you do have a situation…where you've lost a lot of records…and maybe even lost all of the records,…you're gonna have to think about imputation.…
Note: These tutorials are focused on the theory and practical application of binary classification algorithms. No software is required to follow along with the course.
- Why do you need classification?
- Statistical algorithms versus machine learning algorithms
- Combining models using ensembles
- Classification modeling challenges
Skill Level Intermediate
SPSS Statistics Essential Trainingwith Barton Poulson4h 57m Beginner
Machine Learning and AI Foundations: Recommendationswith Adam Geitgey58m 7s Intermediate
1. The Big Picture: Defining Your Classification Strategy
2. How Do I Choose a "Winner"?
3. Algorithms on Parade
4. Common Modeling Challenges
Next steps3m 17s
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.