graph granularity

[Sala, Bruce]

Hello,
Is there a parameter for the JMeterPluginsCMD Command Line Tool that will
adjust the granularity of the graph so that each increment of time is say
...10 seconds or some other specified value?  I am creating a .jtl file
with each execution.  The issue is accurately  identifying the time when a
spike occurs on the transaction response time graph.  Or is there some
other way of interrogating the .jtl file to find this information?

Thanks;
Bruce