Sum data sources in a graph in one area or line

[morya]

Hello,

I would like to sum different data sources to graph them in the following format:

total rx and total tx

I've got the following graph items inputs:

Data source [rxhttp]
Data source [rxicmp]
Data source [rxother]
....
Data source [txhttp]
Data source [txicmp]
Data source [rxother]
....

I'm currently graphing a line using FFFFFF color in my graph templates items per data source so i can get the following DEF:

DEF:a="/var/lib/cacti/rra/idirect_nms_server_txtcp_816.rrd":rxtcp:AVERAGE \
DEF:b="/var/lib/cacti/rra/idirect_nms_server_txtcp_816.rrd":rxudp:AVERAGE \
DEF:c="/var/lib/cacti/rra/idirect_nms_server_txtcp_816.rrd":rxhttp:AVERAGE \
DEF:d="/var/lib/cacti/rra/idirect_nms_server_txtcp_816.rrd":rxicmp:AVERAGE \

Then i'm using a CDEF Function to sum it all per direction (format a,b,c,d,+,+,+). I would like to get rid of it and just create one line for the rx data sources and one area for the tx data sources.

How could i do it?

Thanking you

Morya

[gandalf]

You may want to use AGGREGATE and use the sum function it provides
R.