Inizializzazione

jpgraph-3.5.0b1/src/Examples/manualtickex1a.php

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+<?php // content="text/plain; charset=utf-8"
+//
+// Basic example on how to use custom tickmark feature to have a label
+// at the start of each month.
+//
+require_once ('jpgraph/jpgraph.php');
+require_once ('jpgraph/jpgraph_line.php');
+require_once ('jpgraph/jpgraph_utils.inc.php');
+
+// 
+// Create some random data for the plot. We use the current time for the
+// first X-position
+//
+$datay = array();
+$datax = array();
+$ts = time();
+$n=15; // Number of data points
+for($i=0; $i < $n; ++$i ) {
+    $datax[$i] = $ts+$i*700000; 
+    $datay[$i] = rand(5,60);
+}
+
+// Now get labels at the start of each month
+$dateUtils = new DateScaleUtils();
+list($tickPositions,$minTickPositions) = $dateUtils->GetTicks($datax);
+
+// We add some grace to the end of the X-axis scale so that the first and last
+// data point isn't exactly at the very end or beginning of the scale
+$grace = 400000;
+$xmin = $datax[0]-$grace;
+$xmax = $datax[$n-1]+$grace;
+
+//
+// The code to setup a very basic graph
+//
+$graph = new Graph(400,200);
+
+//
+// We use an integer scale on the X-axis since the positions on the X axis
+// are assumed to be UNI timestamps
+$graph->SetScale('intlin',0,0,$xmin,$xmax);
+$graph->title->Set('Basic example with manual ticks');
+$graph->title->SetFont(FF_ARIAL,FS_NORMAL,12);
+
+//
+// Make sure that the X-axis is always at the bottom of the scale
+// (By default the X-axis is alwys positioned at Y=0 so if the scale
+// doesn't happen to include 0 the axis will not be shown)
+$graph->xaxis->SetPos('min');
+
+// Now set the tic positions
+$graph->xaxis->SetTickPositions($tickPositions,$minTickPositions);
+
+// The labels should be formatted at dates with "Year-month"
+$graph->xaxis->SetLabelFormatString('My',true);
+
+// Use Ariel font
+$graph->xaxis->SetFont(FF_ARIAL,FS_NORMAL,9);
+
+// Add a X-grid
+$graph->xgrid->Show();
+
+// Create the plot line
+$p1 = new LinePlot($datay,$datax);
+$p1->SetColor('teal');
+$graph->Add($p1);
+
+// Output graph
+$graph->Stroke();
+
+?>
+
+