[PHP] Draw function diagram
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 Thanks Excuse me for my bad english
Re: [PHP] 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 [EMAIL PROTECTED] 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...
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