What are some common PHP libraries or functions that can be used to generate graphical representations, such as a Gaussian bell curve?

To generate a Gaussian bell curve graph in PHP, you can use libraries like GD or Imagick to create the image and plot the curve. You can calculate the values of the curve using the Gaussian function and then plot these points on the image to visualize the curve. 

<?php

// Create a new image with specified dimensions
$image = imagecreatetruecolor(800, 600);

// Allocate colors for the curve and background
$curveColor = imagecolorallocate($image, 255, 0, 0);
$bgColor = imagecolorallocate($image, 255, 255, 255);

// Fill the background color
imagefill($image, 0, 0, $bgColor);

// Draw the Gaussian bell curve
for ($x = 0; $x < 800; $x++) {
    $y = gaussian($x, 400, 200, 100); // Adjust parameters for mean, standard deviation, and amplitude
    imagesetpixel($image, $x, $y, $curveColor);
}

// Output the image
header('Content-Type: image/png');
imagepng($image);
imagedestroy($image);

// Gaussian function
function gaussian($x, $mean, $stdDev, $amplitude) {
    return $amplitude * exp(-pow($x - $mean, 2) / (2 * pow($stdDev, 2)));
}

?>

Keywords

PHP libraries functions graphical representations Gaussian bell curve

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