Graal Forums - Quadratic Formula

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- - Quadratic Formula (https://forums.graalonline.com/forums/showthread.php?t=134261753)

dabblercody

01-19-2011 03:29 AM

Quadratic Formula

If anyone can figure out why this formula won't work on Graal. !pissed!

http://en.wikipedia.org/wiki/Quadrat...dratic_formula

PHP Code:


		
			
//#CLIENTSIDE

function onPlayerChats()

{

 if (player.chat == "/quad")

 {

  Quad();

 }

}



function Quad()

{

 temp.a = 5;

 temp.b = 27;

 temp.c = 10;

 temp.x1 = (-temp.b + ((temp.b*temp.b-4*temp.a*temp.c)^0.5))/2*temp.a;

 temp.x2 = (-temp.b - ((temp.b*temp.b-4*temp.a*temp.c)^0.5))/2*temp.a;

 player.chat = "Solution is:" SPC temp.x1 SPC temp.x2;

}

fowlplay4

01-19-2011 03:39 AM

All the information in your other thread is relevant to this one, the only difference is a change of parameters and the formula.

Supply a, b, c and x to calculate y.

y = a * x ^ 2 + b * x + c

dabblercody

01-19-2011 03:41 AM

What would the x represent?

salesman

01-19-2011 03:44 AM

Quote:

Originally Posted by dabblercody (Post 1623961)

If anyone can figure out why this formula won't work on Graal. !pissed!

http://en.wikipedia.org/wiki/Quadrat...dratic_formula

I'd just go through and separate everything with parenthesis and see if that works:

PHP Code:


		
			
temp.x1 = (-temp.b + ((temp.b ^ 2) - (4 * temp.a * temp.c)) ^ .5) / (2 * temp.a)

dabblercody

01-19-2011 03:45 AM

Haha that worked salesman thanks.

fowlplay4

01-19-2011 03:52 AM

Quote:

Originally Posted by dabblercody (Post 1623966)

What would the x represent?

Re-read: http://en.wikipedia.org/wiki/Quadratic_Formula#Geometry

It's used to calculate the Y position on a graph based on your a, b, c and X position on the graph.

Aside from maybe an EXP formula or other statistical values I can't see any other practical use in Graal unless you're using it for graphing for some reason.

MrOmega

01-19-2011 04:04 AM

Quote:

Originally Posted by fowlplay4 (Post 1623972)

Graal has been my personal calculator on some of my personal calculus homework. :P

dabblercody

01-19-2011 11:01 PM

Lmao yeah I can't wait for pre calc next year for my senior year of HS. I'n only in Prob & Stat so I sometimes let Graal do my homework as well.

WhiteDragon

01-19-2011 11:52 PM

I'm letting you know right now that it'd be a much better idea to invest in learning mathematica instead, if doing Math homework is the goal.

darkcloud667

01-22-2011 01:16 AM

im a little curious as to how you would be able to implement this to show the formula in a particle form. i mean showing the parabola that the equation would create. i think it'd be pretty cool to be able to do parabolas on graal out of pretty lights.

any ideas :o

Fulg0reSama

01-22-2011 01:25 AM

Quote:

Originally Posted by darkcloud667 (Post 1624711)

That would be kinda weird, but definitely an out there idea.

cbk1994

01-22-2011 01:30 AM

Quote:

Originally Posted by darkcloud667 (Post 1624711)

A simple parabola:

http://u.graalcenter.org/i/asdf.png

Not sure if it's possible to use particles but you could easily use lights:

PHP Code:


		
			
//#CLIENTSIDE
function onCreated() {
  this.showLights();
}

function showLights() {
  temp.c = 0;
  
  for (temp.i = (- 15); i <= 15; i += 0.5) { // change this to change the range of x values
    with (findimg(200 + c)) {
      x = 25 + i;
      y = 10 + parabola(i);
      
      image = "light4.png";
      
      layer = 3;
      
      red = 1;
      green = 0;
      blue = 0;
      
      alpha = 0.9;
    }
    
    c ++;
  }
}

function parabola(i) { // returns y for y = 1/10(x^2); like f(x) = 1/10(x^2)
  return (1/10) * (i ^ 2);
}

http://u.graalcenter.org/i/Capture%2...37.53%20PM.png

WhiteDragon

01-22-2011 01:34 AM

You can also grab utility_graph from GBench, join it, and call

PHP Code:


		
			
this.graphLine("Graph title", temp.xs, temp.ys);

It should create a graph like the one in that thread.

MysticX2X

01-25-2011 06:03 PM

Takes 10 seconds to do this on a graphing calculator.

fowlplay4

01-25-2011 08:15 PM

Is the window background shadow thing when you're taking a screen-shot, a Mac feature or what?

cbk1994

01-25-2011 10:51 PM

Quote:

Originally Posted by fowlplay4 (Post 1625510)

Is the window background shadow thing when you're taking a screen-shot, a Mac feature or what?

The shadows are added by Grab, Mac's screenshot utility. It looks a bit silly when you look at it on white, especially when you're on another OS (mainly since gamma correction doesn't seem to work in most web browsers; Mac screenshots always look way too blue on other OSes.) It looks a lot nicer on screen :p.

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