Hi!
For point 1
I want to know if it is possible to show the value of the y-axis on top of respective bar…
You can define a tooltip as follows:
<charts:tooltip trigger="ITEM" position="TOP"/>
Result:
If you want the values to always be displayed, use the label attribute in the series bar:
<charts:series>
<charts:bar>
<charts:label show="true"
position="TOP"/>
</charts:bar>
</charts:series>
Result:
For point 2
It looks like the error is due to incorrect data configuration and encode.
You can increase the logging level of the dataset serialization class to see what data is being sent to the client. To do this add following to your application.properties:
logging.level.io.jmix.chartsflowui.kit.component.serialization.JmixChartSerializer = debug
You can see the supplied data and try to reproduce the problem on the original eCharts example. There you can also modify the data so that the display is correct, then transfer the changes to your project.
Best regards,
Dmitriy