The result of two days learning about SVG graphics 
and playing with concepts for visualizing some real world
data from the "smart grid". This was a good place to stop and share
what I had learned before making this so application specific
it would not be capable of "standing alone". 

<p>
A classic bar chart, with some mouseovers. <br>
<embed src="http://www.geeklabs.com/geeklabssvgchart/geeklabssvgchart.php?demo=1" type="image/svg+xml" height=300 width=900 ></embed><br>

This chart has the labels set to '1' for labelling on changes. 
mouseovers also work. <br> This is 15 minute interval data. <br>
Note the missing reads.. This is why sweeping meters is a bad idea. <br>
<embed src="http://www.geeklabs.com/geeklabssvgchart/geeklabssvgchart.php?demo=2" type="image/svg+xml" height=300 width=900></embed><br>
Note the missing days in this actual "smart" grid data:<br>
<embed src="http://www.geeklabs.com/geeklabssvgchart/geeklabssvgchart.php?demo=3" type="image/svg+xml" height=300 width=900></embed><br>

<p>
Want to know more:
<ul>
<li><a href="barechart.svg">naked SVG chart</A><p>
<li><a href="geeklabssvgchart.php.txt">The PHP code to generate the SVG charts </a><p>
<li><a href="geeklabssvgchart.zip">Everything including sample data used</a><p>
</ul>