Does Extjs charts have support for multiple y-axis?

[mtycholaz]

Our client has need for two chart requirements and I need help finding out if Extjs 4 will support our requirements.

One requirement is to plot two datastores on the same graph (overlapped), and to display two y-axis scales. Our client wants to see the relation between the data. One datastore could have a range of 0-100, while the other datastore could have a range of 10,000-1,000,000. The problem is what if you were to show both, the first datastore would look like a flat line.

The second requirement would be to draw operational boundary for a scatter plot. Essentially just show a box on the scatter plot graph. This way the client can easily see if a datapoint is within the box (acceptable operational range) or not.

Thanks for your help.

[Allan]

There is the possibility to have two y axes, one on the left and one on the right at least. There *may* be the possibility to have multiple y axes on the same side of the chart though that's not clear and no example seems to be available for that. I'm going by http://dev.sencha.com/deploy/ext-4.0...s.Numeric.html.

I'm not sure if the chart can display from multiple stores, the docs http://dev.sencha.com/deploy/ext-4.0...art.Chart.html would indicate a single store.

Don't know about the operational boundary for a scatter plot, suspect not!

[dharnig]

Yes. For yAxis with different scales use the left and right axis.

xtype: 'chart',
width: 400,
height: 300,
store: myStore,
axes: [
	{
		//title: 'Size',
		type: 'Numeric',
		position: 'left',
		fields: ['sizeInBytes'],
		minimum: 0
	},{
		//title: 'Run Time',
		type: 'Numeric',
		position: 'right',
		fields: ['runTimeMin'],
		minimum: 0
	},{
		//title: 'Date',
		type: 'Time',
		position: 'bottom',
		fields: ['startTime'],
		dateFormat: 'm/d/y h:i A'
	}
],
series: [
	{
		type: 'column',
		axis: 'left',
		xField: 'startTime',
		yField: 'sizeInBytes'
	},{
		type: 'line',
		axis: 'right',
		xField: 'startTime',
		yField: 'runTimeMin'
	}
]

[mtycholaz]

I need more than two y-axis. I have a minimal requirement of at least eight y-axis; all of them different scales.

[interose]

Hi,
did anybody tried to use more than two y-axis? I want to combine two line series with one column bar serie. Unfortunately every series has its own scale.

I found a pretty highcharts-example (http://www.highcharts.com/demo/combo-multi-axes). I've read somewhere about a hightcharts plugin or connector but didn't searched into further because I don't want to include two big js-libs.

Regards Marcus

[Daniil]

Sencha opened a ticket for supporting multiple axes per position.
http://www.sencha.com/forum/showthread.php?275032