I discovered an array's mean, mode, median, and standard deviation. Now I'd like to plot them in a graph. I want to create an array line chart and highlight the mean, mode, median, and standard deviation. I tried something below, but only the x and y axes appeared, with no digits; I'm new to php. I need assistance converting my array to a line chart. Is there anyone who can assist me? Thank you very much.
My code is:
<?php
echo "Welcome to my project".'<br>'.'<br>';
$arr=array(1100,3150,4430,4430,5170,7450,7450,7450,8230);
for($i=0; $i<=8; $i++)
{
if ($arr[$i]<100) {
$arr[$i]=$arr[$i];
}
else
{
$arr[$i]=$arr[$i]/1000;
$arr[$i]=(string)$arr[$i];
}
}
function calculate($arr, $output){
switch($output){
case 'mean':
$count = count($arr)+1;
$sum = array_sum($arr);
$total = $sum / $count;
break;
case 'median':
rsort($arr);
$middle = (count($arr) / 2)+1;
$total = $arr[$middle-1];
break;
case 'mode':
$v = array_count_values($arr);
arsort($v);
foreach($v as $k => $v){$total = $k; break;}
break;
}
return $total;
}
function sd_square($x, $total) { return pow($x - $total,2); }
function sd($arr) {
return sqrt(array_sum(array_map("sd_square", $arr, array_fill(0,count($arr), (array_sum($arr) / count($arr)) ) ) ) / (count($arr)-1) );
}
echo ' '.'<br>';
echo "Values: ";
echo json_encode($arr).'<br>';
echo 'Mean: '.calculate($arr, 'mean').'<br>';
echo 'Median: '.calculate($arr, 'median').'<br>';
echo 'Mode: '.calculate($arr, 'mode').'<br>';
echo "Standart Derivation: ".sd($arr);
?>
<!DOCTYPE HTML>
<html>
<head>
<script>
window.onload = function () {
var chart = new CanvasJS.Chart("chartContainer", {
title: {
text: "Analysis"
},
axisY: {
title: "Variables"
},
data: [{
type: "line",
arr: <?php echo json_encode($arr, JSON_NUMERIC_CHECK); ?>
}]
});
chart.render();
}
</script>
</head>
<body>
<div id="chartContainer" style="height: 250px; width: 50%;"></div>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
</body>
</html>
