Customize tool tip for Line chart with multiple data sources

Hi ,

I have been using multiple data sources with line chart and want to customize the tool tip instead of Thingworx standard in the mashup and tried as follows :

${DataSource1:toolTipValue}#newline#${DataSource2:toolTipValue}#newline#${DataSource3:toolTipValue}#newline#${DataSource4:toolTipValue};

But in the runtime I'm getting tooltip as follows :

In runtime I'm getting 'N/A' if the value is not there for a particular data source in the hover point.

Is there any solution to hide out or remove 'N/A'  ?

Thanks in Advance 🙂