Looking for tips for graphing CPU and memory output collected from top output of Linux box

[soniya]

Any pointers or steps on how to graph CPU and memory output collected over time (example: 3 days) from top output of Linux box .

[macan]

you don't need parse top output. Data are in snmp (UCD-SNMP-MIB). Create generic snmp oid graph for any of these OIDs:
snmpwalk -v2c -c your_community -On 127.0.0.1 .1.3.6.1.4.1.2021.10.1.3

Howto create graph is described here
http://docs.cacti.net/Graph-a-Single-SNMP-OID.md

[macan]

in UCD is everything what you want:
https://www.circitor.fr/Mibs/Html/U/UCD-SNMP-MIB.php