On Sep 11, 2008, at 3:11 AM, phcgroup wrote:
>
> I write a part of code to generate a source which has random phase
> and orientation in time,
>
> (set! *random-state* (seed->random-state (current-time))); you
> mentioned put this at the top of the .ctl file in a former mail, I
> am not sure if is needed now.
That's still needed, otherwise the "random" numbers will be the same
every time you run Meep.
> Am I right?
Well, you have a certain kind of randomness there. Whether this is
"right" depends on whether this is the random distribution that you
want.
> I know If I want a bunch of sources, I need to write a loop. I think
> I need to write the loop inside (set! sources (list...)), because
> (set! sources...) will replace the former source when a outside loop
> call (set! sources...) every time. Am I right? How to write a loop
> inside (set! sources (list...))?
Well, in your loop body you can do
(set! sources (append sources (list .....)))
to add new items to the previous sources list.
Steven
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