# Future Directions for Statistical Modeling Software

## Why re-think things now?

- Not all modeling concepts from
*S/R* will translate
well into Omega
- Some modeling concepts from
*S/R* deserve re-thinking
- CORBA encourages thinking of interfaces distinct from implementation

## Other initiatives

### Numerical Linear Algebra

- Two implementations in Java from
*NIST* in the US -
*JAMA*
and *Jampack*
- Neither seem to be "the answer" yet
- Don't seem to be based on interfaces

## Components for Statistical Models

- Need data in some form
- Class-wise concepts - fitting method, etc.
- Instance-wise concepts - formula language

## Does the formula/data-frame concept hold up?

- Wilkinson and Rogers language for linear models
- General expressions