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 | require_once ('jpgraph/jpgraph_bar.php'); |
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5 | |
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6 | |
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7 | function toFahrenheit($aVal) { |
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8 | return round(($aVal*9/5)+32,2); |
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9 | } |
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10 | |
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11 | function toCelcius($aVal) { |
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12 | return round(($aVal-32)*5/9,2); |
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13 | } |
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14 | |
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15 | |
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16 | $datay =array(2,3,8,19,7,17,6,22); |
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17 | |
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18 | // Create the graph. |
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19 | $graph = new Graph(400,280); |
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20 | |
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21 | // Slightly bigger margins than default to make room for titles |
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22 | $graph->SetMargin(50,60,40,45); |
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23 | $graph->SetMarginColor('white'); |
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24 | |
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25 | |
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26 | // Setup the scales for X,Y and Y2 axis |
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27 | $graph->SetScale("textlin"); // X and Y axis |
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28 | $graph->SetY2Scale("lin"); // Y2 axis |
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29 | |
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30 | // Overall graph title |
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31 | $graph->title->Set('Synchronized Y & Y2 scales'); |
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32 | $graph->title->SetFont(FF_ARIAL,FS_BOLD,12); |
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33 | |
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34 | // Title for X-axis |
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35 | $graph->xaxis->title->Set('Measurement'); |
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36 | $graph->xaxis->title->SetMargin(5); |
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37 | $graph->xaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11); |
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38 | |
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39 | // Create Y data set |
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40 | $lplot = new BarPlot($datay); |
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41 | $graph->yaxis->title->Set('Celcius (C)'); |
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42 | $graph->yaxis->title->SetMargin(5); |
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43 | $graph->yaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11); |
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44 | // ... and add the plot to the Y-axis |
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45 | $graph->Add($lplot); |
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46 | |
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47 | // Create Y2 scale data set |
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48 | $l2plot = new LinePlot($datay); |
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49 | $l2plot->SetWeight(0); |
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50 | $graph->y2axis->title->Set('Fahrenheit (F)'); |
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51 | $graph->y2axis->title->SetMargin(5); // Some extra margin to clear labels |
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52 | $graph->y2axis->title->SetFont(FF_ARIAL,FS_NORMAL,11); |
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53 | $graph->y2axis->SetLabelFormatCallback('toFahrenheit'); |
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54 | $graph->y2axis->SetColor('navy'); |
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55 | |
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56 | // ... and add the plot to the Y2-axis |
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57 | $graph->AddY2($l2plot); |
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58 | |
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59 | $graph->Stroke(); |
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60 | ?> |
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