valueGraph.php

<?php
// This graphs data found in $filename and outputs as a png file.
// Expected format:
// timestamp\tusdSpent\tusdPortfolioValue\n
$filename = "totalUsdLog.txt";

require_once 'jpgraph/jpgraph.php';
require_once 'jpgraph/jpgraph_line.php';
require_once 'jpgraph/jpgraph_date.php';
require_once 'jpgraph/jpgraph_scatter.php';

$a = preg_split("/\n/", file_get_contents($filename));
$xvalues1 = array();
$yvalues1 = array();
$yvalues2 = array();
foreach ($a as $b) {
    if ($b) {
        $c = preg_split("/\t/", $b);
        $xvalues1[] = (float)$c[0];
        $yvalues1[] = (float)$c[1];
        $yvalues2[] = (float)$c[2];
        $yvalues3[] = (float)($c[2] - $c[1]);
    }
}

$graph = new Graph(750,400);
$graph->SetScale("datlin");

$graph->xaxis->scale->SetTimeAlign( DAYADJ_1 );
$graph->xaxis->SetTextTickInterval(3600*24*7);
$graph->xaxis->SetTextLabelInterval(7);

$graph->yaxis->SetTitle("USD");
//$graph->yaxis->SetLabelMargin(15);

//$graph->img->SetMargin(40,40,40,40);

$graph->title->Set("Cryptocurrency portfolio value");
$graph->title->SetFont(FF_FONT1,FS_BOLD);

// waarde
$sp1 = new ScatterPlot($yvalues2,$xvalues1);
$sp1->mark->SetWidth(2);

// inleg
$sp2 = new ScatterPlot($yvalues1,$xvalues1);
$sp2->mark->SetFillColor("red");
$sp2->mark->SetWidth(2);

// winst/verlies
$sp3 = new ScatterPlot($yvalues3,$xvalues1);
$sp3->mark->SetFillColor("green");


$graph->Add($sp1);
$graph->Add($sp2);
$graph->Add($sp3);
$graph->Stroke();

?>