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Feature Engineering Studio Feature Engineering Studio

Feature Engineering Studio - PowerPoint Presentation

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Feature Engineering Studio - PPT Presentation

September 30 2013 Quick Note Please email me for appointments rather than just showing up at my office Im always glad to talk but I have a lot of meetings and deadlines Also my lab is overly full as I have an 8person space and 14 people working for me ID: 657953

feature features good assignment features feature assignment good excel story person variable time people original engineering don

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Slide1

Feature Engineering Studio

September 30, 2013Slide2

Quick Note

Please email me for appointments rather than just showing up at my office

I’m always glad to talk, but I have a lot of meetings and deadlines

Also, my lab is overly full, as I have an 8-person space and 14 people working for me

So while you’re welcome to visit, it’s unfortunately not possible for me to host your work

activities thereSlide3

Welcome to

Bring Me a Rock DaySlide4

Sort into pairs

Sort yourself by first name

The 1

st

and 2

nd

people are partners

The 3

rd

and 4

th

people are partners

And so onSlide5

Sort into pairs

Go over your reports together

A maximum of 8 minutes apieceSlide6

8 minutes for first personSlide7

8 minutes for second personSlide8

Re-assemble into one big groupSlide9

Features

Each person has to tell us about one of their partner’s features

What is the feature?

What is the

original

just-so story?

How good was the feature?Slide10

Features

Each person has to tell us about one of their own features

What is the feature?

What is the

original

just-so story?

How good was the feature?Slide11

Features

Does anyone have additional features they would like to share?

What is the feature?

What is the

original

just-so story?

How good was the feature?Slide12

Features

Did anyone come up with a great idea for a feature just now?

Your own data set, or someone else’s?

What is the feature?

What is the just-so story?

Write it down! Try it for next week!Slide13

How many features

did you come up with?

EveryoneSlide14

What percentage of your features

were good?

EveryoneSlide15

Did anyone have features that were good but went in the opposite direction of what you thought?

What was the feature?

What was your original just-so-story?

What is your new just-so-story?

Everyone has to answer (though you can say, “I was never wrong”)Slide16

Unless you’re an atomic clock

You should plan to be wrong sometimesSlide17

How did you build your features?

Excel

Some other program than ExcelSlide18

Who here used Pivot Tables?

Tell us about itSlide19

Who here used Vlookup

?

Tell us about itSlide20

Who here used a cutoff-based feature?

Tell us

about itSlide21

Who here used a count variable?

Tell us

about itSlide22

Who here used a count variable over a time window?

(E.g. number of event X over last Y actions)

Tell us about itSlide23

Who here used a =countif

?

Tell us

about itSlide24

Who here used a proportion of one quantity as a variable?

Tell us

about itSlide25

Who here used a ratio between two variables as a variable?

Tell us

about itSlide26

Who here compared specific cases to an average?

Tell us

about itSlide27

Who here compared earlier

behaviors to later behaviors through caching

?

Tell us

about itSlide28

Who here did something cool that doesn’t fit any of these descriptions?

Tell us about itSlide29

Questions? Comments?Slide30

What music did you listen to

While doing this assignment?

I like Paul

Oakenfold

Essential Mixes from the early 1990s, for working in Excel

Good music

is key

Different music for ideation and for engineering!

We’ll discuss this more, later in the semesterSlide31

Assignment 4

Feature Engineering 2

“Bring Me a Another Rock”Slide32

Assignment 4

Create as many features as you feel inspired to create

Features should be created with the goal of predicting your ground truth variable

At least 12 separate features that are not just variations on a theme (e.g. “time for last 3 actions” and “time for last 4 actions” are variations on a theme; but

“time for last 3 actions” and “total time between help requests and next action” are two separate features

)

Features must be distinct from the features you created for today

At least 4 of the features must involve different Excel functionality than what you used for Assignment 3Slide33

Assignment 4

Feature Engineering 2

“Bring Me a Another Rock”

For each feature, write a 1-3 sentence “just so story” for why it might work

Briefly explain (where applicable) the new Excel capacities (or other capacities) you used

Doesn’t have to be a function; each of the types of features I discussed today in a specific slide counts

Test how good each features isSlide34

Assignment 4

Write a brief report for me

Email me an excel sheet with your features

You don’t need to prepare a presentation

But be ready to discuss your features in classSlide35

Next Classes

10/2 Special session on prediction models

Come to this if you don’t know why student-level cross-validation is important, or if you don’t know what J48 is

10/7 Advanced Feature Distillation in Google Refine

Assignment 4 dueSlide36

Upcoming Classes

10/9 Special session? What would people like a special session on?

10/14 Iterative Feature RefinementSlide37

Thank you!