Flotr2 Stacked Bar Chart

We are using the Flotr2 library to make a stacked bar chart here.
Note: stacked bar chart and bar chart are quite similar in terms of settings.

To add a stacked bar chart to your exhibit, you must include the flotr extension for Exhibit (in addition to the Exhibit API):

 <link rel="exhibit-extension" href="http://projects.csail.mit.edu/exhibit/api/extensions/flotr/flotr-extension.js"/>

To include a bar chart, add to your HTML

 <data-ex-role="view" 
        data-ex-view-class="BarChart" 
        data-ex-stacked="true"
        data-ex-values=".confirmed, .suspected, .probable"
        data-ex-grouped-by=".countries">
     </div>

Replace .confirmed, .suspected, .probable, and .countries with appropriate expressions.

Other settings include:

setting name	type of value	default	choices	meaning
plotHeight	int	400		Height of the plot in pixels
plotWidth	int	600		Width of the plot in pixels
verticalChart	boolean	true	true, false	Orientation of bars; bars go horizontally in a vertical chart
valueLabel	text	x		Label for the values
groupLabel	text	y		Label for each bar
stackLabel	text	y		Label for each stack separated by commas; shown in the legend
barWidth	float	0.8		Width of each bar
tickNum	int			Number of ticks along the axis
xAxisMin	float			Minimum value on axis
xAxisMax	float			Maximum value on axis