How to create a graph using a specific value from the rrdtool file?

I need to create multiple graphs for latency, packet loss and jitter etc.
All these values are saved in a single rrdfile i.e. a tarball.

I need to create different graphs. How can i split the rrdtool file to
achieve this.

I know about aggregating the data from multiple separate RRD files, but dont
know about splitting it.

Thanks in advance.
Its Urgent!