119 lines
13 KiB
HTML
119 lines
13 KiB
HTML
<div style="font-weight: bold;margin-left:15px;">timestampex01.php</div><link rel="stylesheet" href="../phphl.css" type="text/css"><div class="hl-main"><table class="hl-table" width="100%"><tr><td class="hl-gutter" align="right" valign="top"><pre>1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
6
|
|
7
|
|
8
|
|
9
|
|
10
|
|
11
|
|
12
|
|
13
|
|
14
|
|
15
|
|
16
|
|
17
|
|
18
|
|
19
|
|
20
|
|
21
|
|
22
|
|
23
|
|
24
|
|
25
|
|
26
|
|
27
|
|
28
|
|
29
|
|
30
|
|
31
|
|
32
|
|
33
|
|
34
|
|
35
|
|
36
|
|
37
|
|
38
|
|
39
|
|
40
|
|
41
|
|
42
|
|
43
|
|
44
|
|
45
|
|
46
|
|
47
|
|
48
|
|
49
|
|
50
|
|
51
|
|
52
|
|
53
|
|
54
|
|
55
|
|
56
|
|
57
|
|
58
|
|
59
|
|
</pre></td><td class="hl-main" valign="top"><pre><span class="hl-inlinetags"><?php</span><span class="hl-code"> </span><span class="hl-comment">//</span><span class="hl-comment"> content="text/plain; charset=utf-8"</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Example on how to treat and format timestamp as human readable labels</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-reserved">require_once</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">jpgraph/jpgraph.php</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-reserved">require_once</span><span class="hl-code"> </span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">jpgraph/jpgraph_line.php</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Number of "fake" data points</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-reserved">DEFINE</span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">NDATAPOINTS</span><span class="hl-quotes">'</span><span class="hl-code">,</span><span class="hl-number">500</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Assume data points are sample every 10th second</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-reserved">DEFINE</span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">SAMPLERATE</span><span class="hl-quotes">'</span><span class="hl-code">,</span><span class="hl-number">10</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Callback formatting function for the X-scale to convert timestamps</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> to hour and minutes.</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-reserved">function</span><span class="hl-code"> </span><span class="hl-identifier">TimeCallback</span><span class="hl-brackets">(</span><span class="hl-var">$aVal</span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
|
|
</span><span class="hl-reserved">return</span><span class="hl-code"> </span><span class="hl-identifier">Date</span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">H:i</span><span class="hl-quotes">'</span><span class="hl-code">, </span><span class="hl-var">$aVal</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-brackets">}</span><span class="hl-code">
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Get start time</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-var">$start</span><span class="hl-code"> = </span><span class="hl-identifier">time</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Set the start time to be on the closest minute just before the "start" timestamp</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-var">$adjstart</span><span class="hl-code"> = </span><span class="hl-identifier">floor</span><span class="hl-brackets">(</span><span class="hl-var">$start</span><span class="hl-code"> / </span><span class="hl-number">60</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Create a data set in range (20,100) and X-positions</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> We also apply a simple low pass filter on the data to make it less</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> random and a little smoother</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-var">$data</span><span class="hl-code"> = </span><span class="hl-reserved">array</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$xdata</span><span class="hl-code"> = </span><span class="hl-reserved">array</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$data</span><span class="hl-brackets">[</span><span class="hl-number">0</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-identifier">rand</span><span class="hl-brackets">(</span><span class="hl-number">20</span><span class="hl-code">,</span><span class="hl-number">100</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$xdata</span><span class="hl-brackets">[</span><span class="hl-number">0</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-var">$adjstart</span><span class="hl-code">;
|
|
</span><span class="hl-reserved">for</span><span class="hl-brackets">(</span><span class="hl-code"> </span><span class="hl-var">$i</span><span class="hl-code">=</span><span class="hl-number">1</span><span class="hl-code">; </span><span class="hl-var">$i</span><span class="hl-code"> < </span><span class="hl-identifier">NDATAPOINTS</span><span class="hl-code">; ++</span><span class="hl-var">$i</span><span class="hl-code"> </span><span class="hl-brackets">)</span><span class="hl-code"> </span><span class="hl-brackets">{</span><span class="hl-code">
|
|
</span><span class="hl-var">$data</span><span class="hl-brackets">[</span><span class="hl-var">$i</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-identifier">rand</span><span class="hl-brackets">(</span><span class="hl-number">20</span><span class="hl-code">,</span><span class="hl-number">100</span><span class="hl-brackets">)</span><span class="hl-code">*</span><span class="hl-number">0</span><span class="hl-number">.2</span><span class="hl-code"> + </span><span class="hl-var">$data</span><span class="hl-brackets">[</span><span class="hl-var">$i</span><span class="hl-code">-</span><span class="hl-number">1</span><span class="hl-brackets">]</span><span class="hl-code">*</span><span class="hl-number">0</span><span class="hl-number">.8</span><span class="hl-code">;
|
|
</span><span class="hl-var">$xdata</span><span class="hl-brackets">[</span><span class="hl-var">$i</span><span class="hl-brackets">]</span><span class="hl-code"> = </span><span class="hl-var">$adjstart</span><span class="hl-code"> + </span><span class="hl-var">$i</span><span class="hl-code"> * </span><span class="hl-identifier">SAMPLERATE</span><span class="hl-code">;
|
|
</span><span class="hl-brackets">}</span><span class="hl-code">
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Assume that the data points represents data that is sampled every 10s</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> when determing the end value on the scale. We also add some extra</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> length to end on an even label tick.</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-var">$adjend</span><span class="hl-code"> = </span><span class="hl-var">$adjstart</span><span class="hl-code"> + </span><span class="hl-brackets">(</span><span class="hl-identifier">NDATAPOINTS</span><span class="hl-code">+</span><span class="hl-number">10</span><span class="hl-brackets">)</span><span class="hl-code">*</span><span class="hl-number">10</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-var">$graph</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">Graph</span><span class="hl-brackets">(</span><span class="hl-number">500</span><span class="hl-code">,</span><span class="hl-number">250</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">SetMargin</span><span class="hl-brackets">(</span><span class="hl-number">40</span><span class="hl-code">,</span><span class="hl-number">20</span><span class="hl-code">,</span><span class="hl-number">30</span><span class="hl-code">,</span><span class="hl-number">50</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Now specify the X-scale explicit but let the Y-scale be auto-scaled</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">SetScale</span><span class="hl-brackets">(</span><span class="hl-quotes">"</span><span class="hl-string">intlin</span><span class="hl-quotes">"</span><span class="hl-code">,</span><span class="hl-number">0</span><span class="hl-code">,</span><span class="hl-number">0</span><span class="hl-code">,</span><span class="hl-var">$adjstart</span><span class="hl-code">,</span><span class="hl-var">$adjend</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">title</span><span class="hl-code">-></span><span class="hl-identifier">Set</span><span class="hl-brackets">(</span><span class="hl-quotes">"</span><span class="hl-string">Example on TimeStamp Callback</span><span class="hl-quotes">"</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Setup the callback and adjust the angle of the labels</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">xaxis</span><span class="hl-code">-></span><span class="hl-identifier">SetLabelFormatCallback</span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">TimeCallback</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">xaxis</span><span class="hl-code">-></span><span class="hl-identifier">SetLabelAngle</span><span class="hl-brackets">(</span><span class="hl-number">90</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-comment">//</span><span class="hl-comment"> Set the labels every 5min (i.e. 300seconds) and minor ticks every minute</span><span class="hl-comment"></span><span class="hl-code">
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">xaxis</span><span class="hl-code">-></span><span class="hl-identifier">scale</span><span class="hl-code">-></span><span class="hl-identifier">ticks</span><span class="hl-code">-></span><span class="hl-identifier">Set</span><span class="hl-brackets">(</span><span class="hl-number">300</span><span class="hl-code">,</span><span class="hl-number">60</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-var">$line</span><span class="hl-code"> = </span><span class="hl-reserved">new</span><span class="hl-code"> </span><span class="hl-identifier">LinePlot</span><span class="hl-brackets">(</span><span class="hl-var">$data</span><span class="hl-code">,</span><span class="hl-var">$xdata</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$line</span><span class="hl-code">-></span><span class="hl-identifier">SetColor</span><span class="hl-brackets">(</span><span class="hl-quotes">'</span><span class="hl-string">lightblue</span><span class="hl-quotes">'</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">Add</span><span class="hl-brackets">(</span><span class="hl-var">$line</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
|
|
</span><span class="hl-var">$graph</span><span class="hl-code">-></span><span class="hl-identifier">Stroke</span><span class="hl-brackets">(</span><span class="hl-brackets">)</span><span class="hl-code">;
|
|
</span><span class="hl-inlinetags">?></span></pre></td></tr></table></div>
|