Re: string <-> function code

[Dave Benson <daveb at ffem dot org>]

so i made a rather large number of fixes and improvements;
rather than bothering the list with new versions,
just see:
	http://www.ugcs.caltech.edu/~dbenson/mathfunction.html
for all the latest ;)

thanks,
dave

On Wed, Sep 11, 2002 at 09:31:06AM -0700, Dave Benson wrote:
> i've been working on code which allows users
> to enter math expressions at runtime for a fair while.
> 
> i recently decided to beef up the code to include
> differentiation and simplification.
> 
> looking at the TODO list, i thought it might
> be nice if it could be in gsl.
> 
> features:
>  - the usual operators (including precedence), functions etc.
>  - the functions map R^n => R.
>  - fairly optimized
>  - interface for users to add new functions, operators, simplifiers
>  - in the gnu coding style already
>  - license is no problem (since i'm the author, and i'll make it GPL.)
> 
> 
> problems:
>  - uses glib 1.2 (the various typedefs and macros will have to
>    be replaced with gsl equivalents -- i'm willing to do this)
>  - no builtin support for matrix, complex, etc arguments
>    (in a few cases complex numbers and fixed size matrices
>     could be represented as arrays of reals, but that's ugly)
>  - it could probably use a new name (currently MathFunction)
> 
> you might check it out at:
> 	http://www.ugcs.caltech.edu/~dbenson/mathfunction-0.0.0.tar.gz
> 
> 
> any interest?  what's required?
> 
> - dave

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