For example:
With the following series title set,
$myline->setTitle("UTILITIES Actual");
The graph will not display the series under one title in the legend, but instead shows a legend entry for each point on the graph
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The only work-around for this is to draw a 'fake line' on top of one of the axes
$line_fake=new Line($c->getChart());
$line_fake->setTitle(" ");
$line_fake->setLabels($labels);
$line_fake->addArray($data_fake);
$line_fake->setColor(new Color(128,128,128));
Now, I get the desired result, except for the extra line that appears in the legend

Is there any other way to do this?
I think that the natural behavior for legends should be to use the series title if it exists, otherwise do a point-by-point listing
Thanks