1 | <?php // content="text/plain; charset=utf-8" |
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2 | // |
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3 | // Example of frequence bar |
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4 | // |
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5 | require_once ('jpgraph/jpgraph.php'); |
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6 | require_once ('jpgraph/jpgraph_bar.php'); |
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7 | require_once ('jpgraph/jpgraph_line.php'); |
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8 | |
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9 | // Utility function to calculate the accumulated frequence |
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10 | // for a set of values and ocurrences |
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11 | function accfreq($data) { |
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12 | rsort($data); |
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13 | $s = array_sum($data); |
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14 | $as = array($data[0]); |
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15 | $asp = array(100*$as[0]/$s); |
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16 | $n = count($data); |
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17 | for( $i=1; $i < $n; ++$i ) { |
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18 | $as[$i] = $as[$i-1]+$data[$i]; |
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19 | $asp[$i] = 100.0*$as[$i]/$s; |
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20 | } |
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21 | return $asp; |
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22 | } |
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23 | |
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24 | // some data |
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25 | $data_freq = array(22,20,12,10,5,4,2); |
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26 | $data_accfreq = accfreq($data_freq); |
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27 | |
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28 | // Create the graph. |
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29 | $graph = new Graph(350,250); |
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30 | |
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31 | // Setup some basic graph parameters |
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32 | $graph->SetScale("textlin"); |
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33 | $graph->SetY2Scale('lin',0,100); |
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34 | $graph->img->SetMargin(50,70,30,40); |
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35 | $graph->yaxis->SetTitleMargin(30); |
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36 | $graph->SetMarginColor('#EEEEEE'); |
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37 | |
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38 | // Setup titles and fonts |
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39 | $graph->title->Set("Frequence plot"); |
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40 | $graph->xaxis->title->Set("X-title"); |
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41 | $graph->yaxis->title->Set("Y-title"); |
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42 | |
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43 | $graph->title->SetFont(FF_FONT1,FS_BOLD); |
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44 | $graph->yaxis->title->SetFont(FF_FONT1,FS_BOLD); |
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45 | $graph->xaxis->title->SetFont(FF_FONT1,FS_BOLD); |
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46 | |
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47 | // Turn the tickmarks |
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48 | $graph->xaxis->SetTickSide(SIDE_DOWN); |
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49 | $graph->yaxis->SetTickSide(SIDE_LEFT); |
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50 | |
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51 | $graph->y2axis->SetTickSide(SIDE_RIGHT); |
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52 | $graph->y2axis->SetColor('black','blue'); |
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53 | $graph->y2axis->SetLabelFormat('%3d.0%%'); |
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54 | |
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55 | // Create a bar pot |
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56 | $bplot = new BarPlot($data_freq); |
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57 | |
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58 | // Create accumulative graph |
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59 | $lplot = new LinePlot($data_accfreq); |
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60 | |
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61 | // We want the line plot data point in the middle of the bars |
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62 | $lplot->SetBarCenter(); |
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63 | |
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64 | // Use transperancy |
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65 | $lplot->SetFillColor('lightblue@0.6'); |
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66 | $lplot->SetColor('blue@0.6'); |
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67 | $graph->AddY2($lplot); |
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68 | |
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69 | // Setup the bars |
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70 | $bplot->SetFillColor("orange@0.2"); |
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71 | $bplot->SetValuePos('center'); |
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72 | $bplot->value->SetFormat("%d"); |
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73 | $bplot->value->SetFont(FF_ARIAL,FS_NORMAL,9); |
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74 | $bplot->value->Show(); |
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75 | |
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76 | // Add it to the graph |
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77 | $graph->Add($bplot); |
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78 | |
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79 | // Send back the HTML page which will call this script again |
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80 | // to retrieve the image. |
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81 | $graph->Stroke(); |
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82 | |
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83 | ?> |
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