shift factor for logfreq

Dear developers and users,

I'm interested in dumping configuration with a logarithmic frequency
(using logfreq), adding a constant shift factor: from
logfreq(10,4,10): 10 20 30 40 100 200 300 400 ... to 10+a 20+a 30+a
I would like to do that for different values of the shift factor
during a single run.
Is there a smart way to do that?

Thanks a lot,



Does this work:

variable a equal 5
variable s equal logfreq(10,3,10)+v_a