Graficar Ecuacion en PHP

Pattinio · #1 (**permalink**) 13/04/2008, 18:42

Amigos, tengo una ecuacion de segundo grado resuelta en javascript donde obtengo la solucion.
Mi duda es ¿ Como grafico mis resultados en PHP ?

Aca les dejo una imagen del tipo de grafico que necesito hacer

http://img136.imageshack.us/img136/6871/cuadraticavc1.png

eddwinpaz · #2 (**permalink**) 13/04/2008, 19:36

Eso es para graficar tu linea. actualmente no se como se llama pero la entiendo como exponencial. Claro este script solo dibuja una linea bioritmica. usa la funcion on los parametros. de dicha funcion y modificalos a tu vendrio.[PHP]<?php
include "langsettings.php";

// Biorhythm by Till Gerken
// http://www.zend.com/zend/tut/dynamic.php
//
// Multi-language support by Kai Oswald Seidler, 2003
//
// Print a standard page header
//
function pageHeader() {
global $TEXT;

echo "<html><head>";
echo '<link href="xampp.css" rel="stylesheet" type="text/css">';
echo "<title></title>";
echo "</head><body>";

echo " <p><h1>".$TEXT['bio-head']."</h1>";
echo $TEXT['bio-by']." Till Gerken<br><a class='black' href='http://www.zend.com/zend/tut/dynamic.php'>http://www.zend.com/zend/tut/dynamic.php</a><p>";
}

//
// Print a standard page footer
//
function pageFooter() {
echo "</body></html>";
}

//
// Function to draw a curve of the biorythm
// Parameters are the day number for which to draw,
// period of the specific curve and its color
//
function drawRhythm($daysAlive, $period, $color) {
global $daysToShow, $image, $diagramWidth, $diagramHeight;

// get day on which to center
$centerDay = $daysAlive - ($daysToShow / 2);

// calculate diagram parameters
$plotScale = ($diagramHeight - 25) / 2;
$plotCenter = ($diagramHeight - 25) / 2;

// draw the curve
for ($x = 0; $x <= $daysToShow; $x++) {
// calculate phase of curve at this day, then Y value
// within diagram
$phase = (($centerDay + $x) % $period) / $period * 2 * pi();
$y = 1 - sin($phase) * (float)$plotScale + (float)$plotCenter;

// draw line from last point to current point
if ($x > 0) {
imageLine($image, $oldX, $oldY, $x * $diagramWidth / $daysToShow, $y, $color);
}

// save current X/Y coordinates as start point for next line
$oldX = $x * $diagramWidth / $daysToShow;
$oldY = $y;
}
}

//
// ---- MAIN PROGRAM START ----
//

// check if we already have a date to work with,
// if not display a form for the user to enter one
//
if (!isset($_REQUEST['birthdate'])) {
pageHeader();
?>
<form method="post" action="<?php echo basename($_SERVER['PHP_SELF']); ?>">

<?php echo $TEXT['bio-ask']; ?>:
<br>
<input type="text" name="birthdate" value="MM/DD/YYYY"><p>
<input type="submit" value="<?php echo $TEXT['bio-ok']; ?>">
<input type="hidden" name="showpng" value="1">
</form>
<?php

include("showcode.php");

pageFooter();
exit;
}

// get different parts of the date
$birthMonth = substr($_REQUEST['birthdate'], 0, 2);
$birthDay = substr($_REQUEST['birthdate'], 3, 2);
$birthYear = substr($_REQUEST['birthdate'], 6, 4);

// check date for validity, display error message if invalid
if (!@checkDate($birthMonth, $birthDay, $birthYear)) {
pageHeader();

//print("The date '$birthMonth/$birthDay/$birthYear' is invalid.");
echo "<h2>".$TEXT['bio-error1']." '$birthMonth/$birthDay/$birthYear' ".$TEXT['bio-error2'].".</h2>";

pageFooter();
exit;
}

if (isset($_POST['showpng']) && ($_POST['showpng'] == 1)) {
pageHeader();

echo "<img src=".basename($_SERVER['PHP_SELF'])."?birthdate=".urlencode($_REQUEST['birthdate'])." alt=''>";

pageFooter();
exit;
}

// specify diagram parameters (these are global)
$diagramWidth = 710;
$diagramHeight = 400;
$daysToShow = 30;

// calculate the number of days this person is alive
// this works because Julian dates specify an absolute number
// of days -> the difference between Julian birthday and
// "Julian today" gives the number of days alive
$daysGone = abs(gregorianToJD($birthMonth, $birthDay, $birthYear) - gregorianToJD(date("m"), date("d"), date("Y")));

// create image
$image = imageCreate($diagramWidth, $diagramHeight);

// allocate all required colors
$colorBackgr = imageColorAllocate($image, 192, 192, 192);
$colorForegr = imageColorAllocate($image, 255, 255, 255);
$colorGrid = imageColorAllocate($image, 0, 0, 0);
$colorCross = imageColorAllocate($image, 0, 0, 0);
$colorPhysical = imageColorAllocate($image, 0, 0, 255);
$colorEmotional = imageColorAllocate($image, 255, 0, 0);
$colorIntellectual = imageColorAllocate($image, 0, 255, 0);

// clear the image with the background color
imageFilledRectangle($image, 0, 0, $diagramWidth - 1, $diagramHeight - 1, $colorBackgr);

// calculate start date for diagram and start drawing
$nrSecondsPerDay = 60 * 60 * 24;
$diagramDate = time() - ($daysToShow / 2 * $nrSecondsPerDay) + $nrSecondsPerDay;

for ($i = 1; $i < $daysToShow; $i++) {
$thisDate = getDate($diagramDate);
$xCoord = ($diagramWidth / $daysToShow) * $i;

// draw day mark and day number
imageLine($image, $xCoord, $diagramHeight - 25, $xCoord, $diagramHeight - 20, $colorGrid);
imageString($image, 3, $xCoord - 5, $diagramHeight - 16, $thisDate["mday"], $colorGrid);

$diagramDate += $nrSecondsPerDay;
}

// draw rectangle around diagram (marks its boundaries)
imageRectangle($image, 0, 0, $diagramWidth - 1, $diagramHeight - 20, $colorGrid);

// draw middle cross
imageLine($image, 0, ($diagramHeight - 20) / 2, $diagramWidth, ($diagramHeight - 20) / 2, $colorCross);
imageLine($image, $diagramWidth / 2, 0, $diagramWidth / 2, $diagramHeight - 20, $colorCross);

// print descriptive text into the diagram
imageString($image, 3, 10, 10, $TEXT['bio-birthday'].": $birthDay.$birthMonth.$birthYear", $colorCross);
imageString($image, 3, 10, 26, $TEXT['bio-today'].": ".date("d.m.Y"), $colorCross);
imageString($image, 3, 10, $diagramHeight - 42, $TEXT['bio-physical'], $colorPhysical);
imageString($image, 3, 10, $diagramHeight - 58, $TEXT['bio-emotional'], $colorEmotional);
imageString($image, 3, 10, $diagramHeight - 74, $TEXT['bio-intellectual'], $colorIntellectual);

// now draw each curve with its appropriate parameters
drawRhythm($daysGone, 23, $colorPhysical);
drawRhythm($daysGone, 28, $colorEmotional);
drawRhythm($daysGone, 33, $colorIntellectual);

// set the content type
header("Content-Type: image/png");

// create an interlaced image for better loading in the browser
imageInterlace($image, 1);

// mark background color as being transparent
imageColorTransparent($image, $colorBackgr);

// now send the picture to the client (this outputs all image data directly)
imagePNG($image);
exit;
?>

[PHP]

eddwinpaz · #3 (**permalink**) 13/04/2008, 19:37

http://www.degraeve.com/bio.php