1 | <?php // content="text/plain; charset=utf-8" |
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2 | // |
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3 | // Basic example on how to use custom tickmark feature to have a label |
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4 | // at the start of each month. |
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5 | // |
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6 | require_once ('jpgraph/jpgraph.php'); |
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7 | require_once ('jpgraph/jpgraph_line.php'); |
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8 | require_once ('jpgraph/jpgraph_utils.inc.php'); |
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9 | |
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10 | // |
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11 | // Create some random data for the plot. We use the current time for the |
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12 | // first X-position |
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13 | // |
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14 | $f = new FuncGenerator('cos($x)+1.5*cos(2*$x)'); |
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15 | list($datax,$datay) = $f->E(0,10); |
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16 | |
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17 | // Now get labels at 1/2 PI intervall |
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18 | $tickPositions = array(); |
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19 | $tickLabels = array(); |
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20 | $tickPositions[0] = 0; |
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21 | $tickLabels[0] = '0'; |
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22 | for($i=1; $i/2*M_PI < 11 ; ++$i ) { |
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23 | $tickPositions[$i] = $i/2*M_PI; |
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24 | if( $i % 2 ) |
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25 | $tickLabels[$i] = $i.'/2'.SymChar::Get('pi'); |
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26 | else |
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27 | $tickLabels[$i] = ($i/2).SymChar::Get('pi'); |
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28 | } |
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29 | |
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30 | $n = count($datax); |
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31 | $xmin = $datax[0]; |
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32 | $xmax = $datax[$n-1]; |
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33 | |
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34 | // |
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35 | // The code to setup a very basic graph |
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36 | // |
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37 | $graph = new Graph(400,200); |
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38 | |
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39 | // |
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40 | // We use an integer scale on the X-axis since the positions on the X axis |
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41 | // are assumed to be UNI timestamps |
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42 | $graph->SetScale('linlin',0,0,$xmin,$xmax); |
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43 | $graph->title->Set('Example with manual tick labels'); |
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44 | $graph->title->SetFont(FF_ARIAL,FS_NORMAL,12); |
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45 | |
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46 | // |
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47 | // Make sure that the X-axis is always at the bottom of the scale |
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48 | // (By default the X-axis is alwys positioned at Y=0 so if the scale |
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49 | // doesn't happen to include 0 the axis will not be shown) |
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50 | $graph->xaxis->SetPos('min'); |
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51 | |
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52 | // Now set the tic positions |
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53 | $graph->xaxis->SetMajTickPositions($tickPositions,$tickLabels); |
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54 | |
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55 | // Use Times font |
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56 | $graph->xaxis->SetFont(FF_TIMES,FS_NORMAL,10); |
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57 | $graph->yaxis->SetFont(FF_TIMES,FS_NORMAL,10); |
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58 | |
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59 | // Add a X-grid |
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60 | $graph->xgrid->Show(); |
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61 | |
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62 | // Create the plot line |
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63 | $p1 = new LinePlot($datay,$datax); |
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64 | $p1->SetColor('teal'); |
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65 | $graph->Add($p1); |
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66 | |
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67 | // Output graph |
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68 | $graph->Stroke(); |
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69 | |
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70 | ?> |
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71 | |
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72 | |
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