Re: matrix.ss modification

Noel Welsh wrote:

> <>The Schemathics collection has been neglected for a long
> time.=20

<>For the math-repl "project", I implemented some more operations
from linear algebra on top of the Schemathics matrix library.

 From <http://www.jasoegaard.dk/doc.txt>:

CHANGES (1.0 to 1.01)
----------------------

  - "integration.scm"
       integration now uses Romberg integration
  - "polynomial-roots.scm"
       Laguerre's root finding method finds all roots
       of a polynomial. Usage: (roots list-of-coefs)
  - "linear-algbra.scm"
      o row-reduce, row-echelon-form, reduced-row-echelon-form
      o inverse, linear-solve
      o basis
      o (det matrix)  now handles arbitrary sizes
      o identity-matrix, diagonal-matrix, trace
      o row-space, column-space, rank, nullity
      o gram-schmidt, ortogonal-basis, orthonormal-basis
      o qr, lu
      o jacobi

   - Supports SISC=20
       o Open math-repl/sisc/sisc-start-math-repl.scm in Quack.
       o Run Scheme
       o (load "sisc-start-math-repl.scm")

The coolest stuff in math-repl is the number theorectic code though.
The math-repl wasn't an attempt to make a coherent library, but
rather a quick experiment to see, how much one can bend Scheme
in order to make the normal Scheme repl suitable for "calculator
calculations". See the docs for examples.

<http://www.jasoegaard.dk/math-repl.zip>


(if you study the function jacobi, promise not to become depressed)

--=20
Jens Axel S=F8gaard




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