Inizializzazione

jpgraph-3.5.0b1/src/Examples/datescaleticksex01.php

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+<?php // content="text/plain; charset=utf-8"
+require_once ('../jpgraph.php');
+require_once ('../jpgraph_line.php');
+require_once ('../jpgraph_date.php');
+
+DEFINE('INTERVAL', 5*60);
+
+// First create some "dummy" data
+$m = 5; // Number of data sets
+$n = 4; // Number of bids to show
+$startbid = 8000;
+
+for( $i=0; $i < $m; ++$i ) {
+    $bids[$i] = array($startbid + rand(100,500)*10 );
+    for( $j=1; $j < $n; ++$j ) {
+        $bids[$i][$j] = $bids[$i][$j-1] + rand(20,500)*10;
+    }
+}
+
+$start = floor(time()/INTERVAL)*INTERVAL;
+$times = array($start);
+for( $i=1; $i < $n; ++$i ) {
+    // Create a timestamp for every 5 minutes
+    $times[$i] = $times[$i-1]+INTERVAL;
+}
+
+// Setup the bid graph
+$graph = new Graph(600,250);
+$graph->SetMargin(80,30,50,40);
+$graph->SetMarginColor('white');
+$graph->SetScale('dateint');
+$graph->title->Set('Current Bids');
+$graph->title->SetFont(FF_ARIAL,FS_BOLD,12);
+$graph->subtitle->Set('(Updated every 5 minutes)');
+$graph->subtitle->SetFont(FF_ARIAL,FS_ITALIC,10);
+
+// Enable antialias
+$graph->img->SetAntiAliasing();
+
+// Setup the y-axis to show currency values
+$graph->yaxis->SetLabelFormatCallback('number_format');
+$graph->yaxis->SetLabelFormat('$%s');
+
+//Use hour:minute format for the labels
+$graph->xaxis->scale->SetDateFormat('H:i');
+
+// Force labels to only be displayed every 5 minutes
+$graph->xaxis->scale->ticks->Set(INTERVAL);
+
+// Adjust the start time for an "even" 5 minute, i.e. 5,10,15,20,25, ...
+$graph->xaxis->scale->SetTimeAlign(MINADJ_5);
+
+// Create the plots using the dummy data created at the beginning
+$line = array();
+for( $i=0; $i < $m; ++$i ) {
+    $line[$i] = new LinePlot($bids[$i],$times);
+    $line[$i]->mark->SetType(MARK_SQUARE);
+}
+$graph->Add($line);
+
+// Send the graph back to the client
+$graph->Stroke();
+?>