DataProcessingAndNumericalAnalysis

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Session Title: Data Analysis and Numeric Processing

Organizer: Patrick Ball

(someone PLEASE format this later…)

Attendees:

1. Phil Hodge

2. JC Hsu

3. Perry Greenfield

4. R Kaplan

5. M McFarland

6. Rick Grubin

7. Robert Jedrzejen

8. Jeff Mathews

9. David Brown

10. Erin Stantill

11. Abhay Saxena

Session Notes:

Numeric doesn’t do what we want (although it’s great for what it does do)

Patrick likes Stata

• Many things can do what we want in SQL

A story by Patrick Multiple systems estimation

• Find intersections of lists

• Create list of presence/absence in the other lists

• Estimate what lies outside

Suggestion from Numarray folks

• Use recarray

• Mutable values, not mutable shape

• Perry describes record arrays in detail (sorry, I didn’t get this down…)

Suggestion by Jeff/Abhay

• Use Metakit http://www.equi4.com/metakit/

Use R (like S-Plus)

• http://www.r-project.org/

• http://cran.r-project.org/

• http://rpy.sourceforge.net/

• http://www.omegahat.org/RSPython/index.html

R + Python has problems. Patrick tells of difficulties passing data between Python and R, even simple stuff like small matrices – R gives back data errors (roughly: “I don’t understand what this is”).