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 | // Negate all data |
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14 | $n = count($ydata); |
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15 | for($i=0; $i<$n; ++$i) { |
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16 | $ydata[$i] = round(-$ydata[$i]); |
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17 | } |
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18 | |
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19 | // Basic graph setup |
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20 | $graph = new Graph(400,300); |
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21 | $graph->SetScale("linlin"); |
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22 | $graph->img->SetMargin(50,50,60,40); |
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23 | $graph->SetMarginColor('darkblue'); |
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24 | $graph->SetColor('darkblue'); |
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25 | $graph->SetAxisStyle(AXSTYLE_BOXOUT); |
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26 | $graph->SetBackgroundImage("blueblack400x300grad.png",1); |
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27 | //$graph->SetBackgroundImage("lightbluedarkblue400x300grad.png",1); |
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28 | |
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29 | $graph->title->Set("Depth curve. Dive #2"); |
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30 | $graph->title->SetFont(FF_FONT1,FS_BOLD); |
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31 | $graph->title->SetColor("white"); |
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32 | |
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33 | $graph->subtitle->Set("(Negated Y-axis)"); |
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34 | $graph->subtitle->SetFont(FF_FONT1,FS_NORMAL); |
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35 | $graph->subtitle->SetColor("white"); |
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36 | |
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37 | // Setup axis |
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38 | $graph->yaxis->SetLabelFormatCallback("_cb_negate"); |
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39 | $graph->xaxis->SetColor("lightblue","white"); |
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40 | $graph->yaxis->SetColor("lightblue","white"); |
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41 | $graph->ygrid->SetColor("blue"); |
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42 | |
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43 | |
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44 | $lp1 = new LinePlot($ydata); |
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45 | $lp1->SetColor("yellow"); |
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46 | $lp1->SetWeight(2); |
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47 | |
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48 | |
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49 | $graph->Add($lp1); |
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50 | $graph->Stroke(); |
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51 | ?> |
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52 | |
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53 | |
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