[42] | 1 | <?php // content="text/plain; charset=utf-8" |
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| 2 | require_once ('jpgraph/jpgraph.php'); |
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| 3 | require_once ('jpgraph/jpgraph_line.php'); |
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| 4 | |
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| 5 | // Callback to negate the argument |
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| 6 | function _cb_negate($aVal) { |
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| 7 | return round(-$aVal); |
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| 8 | } |
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| 9 | |
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| 10 | // A fake depth curve |
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| 11 | $ydata = array(0,1,4,5,8,9,10,14,16,16,16,18,20,20,20,22,22.5,22,19,19,15,15,15,15,10,10,10,6,5,5,5,4,4,2,1,0); |
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| 12 | |
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| 13 | $n = count($ydata); |
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| 14 | $y2data = array(); |
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| 15 | for( $i=0; $i< $n; ++$i ) { |
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| 16 | $y2data[] = $ydata[$i]+10; |
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| 17 | } |
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| 18 | |
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| 19 | // Negate all data |
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| 20 | $n = count($ydata); |
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| 21 | for($i=0; $i<$n; ++$i) { |
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| 22 | $ydata[$i] = round(-$ydata[$i]); |
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| 23 | $y2data[$i] = round(-$y2data[$i]); |
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| 24 | } |
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| 25 | |
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| 26 | // Basic graph setup |
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| 27 | $graph = new Graph(400,300); |
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| 28 | $graph->SetScale("linlin"); |
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| 29 | $graph->SetY2Scale("lin"); |
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| 30 | $graph->SetMargin(50,50,60,40); |
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| 31 | $graph->SetMarginColor('darkblue'); |
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| 32 | $graph->SetColor('darkblue'); |
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| 33 | |
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| 34 | // Setup titles |
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| 35 | $graph->title->Set("Inverting both Y-axis"); |
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| 36 | $graph->title->SetFont(FF_FONT1,FS_BOLD); |
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| 37 | $graph->title->SetColor("white"); |
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| 38 | |
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| 39 | $graph->subtitle->Set("(Negated Y & Y2 axis)"); |
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| 40 | $graph->subtitle->SetFont(FF_FONT1,FS_NORMAL); |
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| 41 | $graph->subtitle->SetColor("white"); |
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| 42 | |
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| 43 | // Setup axis |
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| 44 | $graph->yaxis->SetLabelFormatCallback("_cb_negate"); |
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| 45 | $graph->xaxis->SetColor("lightblue","white"); |
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| 46 | $graph->yaxis->SetColor("lightblue","white"); |
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| 47 | $graph->ygrid->SetColor("blue"); |
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| 48 | |
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| 49 | // Setup Y2 axis |
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| 50 | $graph->y2axis->SetLabelFormatCallback("_cb_negate"); |
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| 51 | $graph->y2axis->SetColor("darkred","white"); |
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| 52 | $graph->y2scale->SetAutoMax(0); // To make sure it starts with 0 |
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| 53 | |
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| 54 | // Setup plot 1 |
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| 55 | $lp1 = new LinePlot($ydata); |
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| 56 | $lp1->SetColor("yellow"); |
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| 57 | $lp1->SetWeight(2); |
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| 58 | $graph->Add($lp1); |
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| 59 | |
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| 60 | // Setup plot 2 |
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| 61 | $lp2 = new LinePlot($y2data); |
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| 62 | $lp2->SetColor("darkred"); |
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| 63 | $lp2->SetWeight(2); |
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| 64 | $graph->AddY2($lp2); |
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| 65 | |
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| 66 | $graph->Stroke(); |
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| 67 | ?> |
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| 68 | |
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| 69 | |
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