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MathGroup Archive 1996

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problem devolping a formula

  • Subject: [mg2954] problem devolping a formula
  • From: ryangall at gpu.srv.ualberta.ca (Bobby Sixkiller)
  • Date: 15 Jan 1996 06:13:30 -0600
  • Approved: usenet@wri.com
  • Distribution: local
  • Newsgroups: wri.mathgroup
  • Organization: University of Alberta, Edmonton, Canada
  • Sender: mj at wri.com


 I am wondering if there is any way I can find a formula that will solve 
the following condidion


CONSTANTS: MAX=1000
	   MIN=0
	 

PRECONDITIONS


           Z=SOME NUMBER (arbitrary)
           N=0;
           IF N=0 THEN maxx=MAX;
                       maxy=MAX;
                       minx=MIN;
                       miny=MIN;


POST CONDITION: SPACE is returned as the answer

FORMULA:

  FOR N=0 TO N=Z DO N+1   /* RUN THE LOOP Z TIMES */
  {
   SPACE=(maxx-minx)/(2*MAXAXIS);
   maxy=maxx-1;
   maxy=maxy-1;
   minx=minx+1;
   miny=miny+1;
  }

--------------------------

I hope you understand what I want, I originally wrote this in C, but tried 
to write it more universally for this post.

what I want (if possible) is some formula that wont have to go through 
this for loop/series sum ,to get the desired number.Since the Z value can 
easily be over 10000 the time it take is unacceptable (Im using it for 
graphics).  

I need some function that takes in a z value, and pops out SPACE as the 
answer, If any of you know how to do this, or perhaps doing it some other 
way, please e-mail me asap....one more thing, can you explain how you got 
the answer, I deal with these sorts of problems all the time, but have no 
mathematical insight to them.....If you don have time to explain it, could 
you tell me what I can study to learn about it. THANKS ALOT FOR YOUR HELP!



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