How to choose PHPExcel graph type in detail?
<p>Following the <a href="https://github.com/PHPOffice/PHPExcel/blob/1.8/Examples/33chartcreate-line.php" rel="nofollow noreferrer">official example</a> on generating line graph, I am able to create a line graph. However, when I use my own set of data, changing only the data source with all other parts exactly the same as the official example, somehow PHPExcel decide to choose "Stacked line with marker" instead of the "Line with marker".</p>

<p>This is the type of the graph generated. (Stacked line with marker)
<a href="https://i.stack.imgur.com/jJPFQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jJPFQ.png" alt="enter image description here"></a></p>

<p>This is the type I want, the the default type before I change the data.
<a href="https://i.stack.imgur.com/ahRgC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ahRgC.png" alt="enter image description here"></a></p>

<p>How to set the line graph type in the code?</p>