<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hello,</div>

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<div>we use RRDTools with an own PHP script and generate graphs at this way:</div>

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<div><span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options = &quot;&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; &#36;img_file&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; -t &#92;&quot;&#36;vdesc&#92;t&#36;desc2&#92;&quot; &quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; --start &#36;start&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; --end &#36;end&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; -w &#36;width&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; -h &#36;height&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; --slope-mode&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; -c SHADEA#f0f0f0 &quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; -c SHADEB#f0f0f0 &quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; -W &quot;.&#36;config[&#39;watermark&#39;];</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; -c ARROW#58A6A7 &quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; DEF:&#36;val=&#36;rrd_file:&#36;sid:AVERAGE&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; LINE2:&#36;val&#36;color[&#36;i]:&#92;&quot;&#36;beschreibung&#92;&quot; &quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; GPRINT:&#36;val:LAST:&#92;&quot;%4.1lf&#92;&quot;&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; GPRINT:&#36;val:MIN:&#92;&quot;min %4.1lf%s&#92;&quot;&quot;;</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">&#36;options .= &quot; GPRINT:&#36;val:MAX:&#92;&quot;max %4.1lf%s&#92;l&#92;&quot;&quot;;</span><br/>
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<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">popen(RRDTOOL.&quot; graph &#36;options&quot;, &quot;r&quot;);</span></div>

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<div><span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">When we now generate graphs with different sizes unfortunately the values for LAST, MIN and MAX</span> change also:</div>

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<div><span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">small picture:</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#0000FF ; BACKGROUND-COLOR:transparent ; TEXT-DECORATION: underline; "><a href="http://km2.klima-monitor.de/system.graph.php?mode=view&amp;vid=3&amp;t=y&amp;se=2&amp;start=01.01.2013&amp;end=01.01.2014&amp;width=429&amp;height=200">http://km2.klima-monitor.de/system.graph.php?mode=view&amp;vid=3&amp;t=y&amp;se=2&amp;start=01.01.2013&amp;end=01.01.2014&amp;width=429&amp;height=200</a></span><br/>
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<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#000000 ; BACKGROUND-COLOR:transparent ; ">big picture:</span><br/>
<span style="FONT-FAMILY:&#39;Courier New&#39; ; FONT-SIZE:12 ; COLOR:#0000FF ; BACKGROUND-COLOR:transparent ; TEXT-DECORATION: underline; "><a href="http://km2.klima-monitor.de/system.graph.php?mode=view&amp;vid=3&amp;t=y&amp;se=2&amp;start=01.01.2013&amp;end=01.01.2014&amp;width=837&amp;height=400">http://km2.klima-monitor.de/system.graph.php?mode=view&amp;vid=3&amp;t=y&amp;se=2&amp;start=01.01.2013&amp;end=01.01.2014&amp;width=837&amp;height=400</a></span></div>
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<div>I think it is a problem with sampling the used values from the archive. Is there a way to make this better?</div>

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<div>Thank you for all help</div>

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<div>Lutz</div>
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