[rrd-users] RPN Question

[Fabien Wernli]

On Tue, Apr 17, 2007 at 04:27:02AM -0700, Wesley PA4WDH wrote:
> I have tried this:
> total=new_value,UN,total_calucated_so_far,total_calulated_so_far,new_value,+,IF

you need to replace this with something like:

total=new_value,UN,0,new_value,IF,old_value,+

which will add new_value to old_value or zero if undefined