OK I'll sent the stats library as soon as I put it all together. MetaCard
corp. has proved itself to me as a company that will do it's best to
accomodate users requests so try emailing [EMAIL PROTECTED] if you have
specific algorithmns you would like to see as part of the engine.
PS It sounds like you won't be learning much about stats functions from me
but the prob F approximation was pretty hard to find (most references to
this function actualy calculate it the long way which is extremley
complicated with only very minor improvements in accuracy.
Regards
Monte
>From: Gregory Lypny <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: [EMAIL PROTECTED]
>Subject: Re: Graphing stack or script and matrix calculations
>Date: Fri, 10 Nov 2000 08:10:58 -0500
>
>Hi Monte,
>
> Yes, I agree. MC could be such a powerful tool for research (I've
>already used it as such), but easy access to core mathematical and
>graphing functions is vital. I remember a software company that used to
>develop external functions and commands for HyperCard, although the name
>escapes me right now, and the set of matrix functions was pretty darn
>good.
>
> It's easy to underestimate the usefulness of the mathematical
>functions, particularly matrix manipulation. If matrix functions were
>available, it would be possible to do multiple regression analysis ---
>great for modest research projects and courseware. But matrix funtions
>are also vital for generating draws from joint probability distributions;
>this is a powerful way to simulate the behaviour of many natural
>phenomena, and that should be of interest to those developing games.
>
> As for graphing (and displaying data in tables), this is such a
>fundamental tool for the presentation of ideas that books have been
>written about it.
>
> Thanks for offering your statistical functions, and yes, I would be
>interested in having a look at them. I will certainly share mine with
>members of this list as I develop them.
>
> Regards,
>
> Greg
>
>
>
>
>On 10/11/2000 11:35 AM, Monte wrote:
>
> >If you find what you want be sure to let me know because I've asked about
> >this before and nothing was forthcoming but you never know you luck in
>the
> >big city.
> >
> >PS I think It would be a huge step in MC development if this list ppoled
>our
> >resources to create function libraries like in C programming. All we
>would
> >need to do is call library(or start using) "Math" in the preOpenStack
> >handler and we might have a huge list of functions to start using. The
> >scripters scrap book (found at www.flexiblelearning.com) is a start but
>we
> >need to divide things up into little stacks that arent very big that just
> >have a stack script. Probably having a stack that would manage these
>library
> >stacks would also be good (searching for handlers and functions and
> >sellecting functions to place into a new library stack that sor of
>stuff).
> >When I have thime I plan to start on this but it wont be for a while
>(maybe
> >six months).
> >
> >PPS I have some usefull statistical functions if you want:
> >Variance
> >Standard Deviation
> >Z score
> >Normal probability - approximation
> >T score
> >Prob. T - approximation
> >F-Ratio
> >Prob. F - approximation
> >
> >Let me know if you want - maybe this could be the start of the statistics
> >library.
>
>
>
>_________________________________________
>Gregory Lypny
>Associate Professor of Finance
>Concordia University
>
>_________________________________________
>"Take chances, make mistakes!"
> - Ms Frizzle, The Magic School Bus
>
>
>
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