Re: Draw function diagram

Hi I worked alittle with gd It is my code for y(x)=sin(x)+cos(x): function Graph($rangeLow, $rangeHigh, $step) {

       $img = ImageCreate($this->width, $this->height);
       $background_color = imagecolorallocate($img, 0, 0, 0);
       $white = ImageColorAllocate($img, 255, 255, 255);
       imageline($img, $this->width/2, 0,$this->width/2 , $this->height,

$white);

       imageline($img, 0, $this->height/2, $this->width, $this->height/2,

$white);

       for ($x=rangeLow;$x<=$rangeHigh,$x+=$step)
       {
            y=sin(x)*cos(x);//custom function
            //i dont know what should write here but i know that I should

write imageline() function

        }
       header("Content-type: image/jpeg");
       ImageJpeg($img);
       imagedestroy($img);

} could anyone write a simple code that complete this code I want to learn it I dont want to use any software package Thanks On 6/6/07, Richard Lynch <ceo@l-i-e.com> wrote:

On Tue, June 5, 2007 4:36 pm, Khorosh Irani wrote: Hello I have a function like (y(x)=sin(x)) that i convert it to post fix and then execute it.means that i coud get y for each x value now I have a simple question I want to draw diagram of function. how I should do this I dont work with gd and also i donot now how I should done this.but i think that i should get a range for x and get y for each x but i dont know how I shold draw diagram after this Start working with GD would be my first answer... If you can't use GD, then I would guess that somewhere "out there" there may exist a software package that you can pass "sin(x)" to it, and it will create a graph for you... No idea what it's called, though... -- Some people have a "gift" link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So?