Re: output-dpwr-in-objects

Hi Steven,

Thanks for that, I confused with (output-dpwr bands) which can be called after the run command.

Regards,

Fred



On Jun 26 2007, Steven G. Johnson wrote:

>On Fri, 22 Jun 2007, F.S.F. Brossard wrote:
>> Continuing with the H1 cavity, the additional line below should output 
>> the energy density of all the bands, since the condition is "greater 
>> than 0" but nothing is generated (no error but no output). What is 
>> wrong?
>>
>> (run-zeven)
>>
>> (output-dpwr-in-objects output-dpwr 0 (make cylinder (center 0)
>> 			(radius (- 1 r)) (height h)
>> 			(material (make dielectric (epsilon eps)))))
>
>The result of (output-dpwr-in-objects ...) is a *function* which you have 
>to pass to run-zeven.  That is, do
>
>    (run-zeven (output-dpwr-in-objects ....))
>
>The reason is that what you pass to run-zeven, and the other run 
>functions, are functions f(band) which are called for each band and let 
>you do whatever computations you want.  output-dpwr-in-objects returns a 
>function f(band) that, given a band, checks whether the energy in the 
>given object is bigger than the threshold, and if so calls the given 
>output function.
>
>Your code, above, calls (output-dpwr-in-objects ...) to produce the 
>function, but doesn't actually call the function for any bands and hence 
>it doesn't do anything.
>
>See the section "Run functions" in the User Reference section of the MPB 
>manual.
>
>Regards,
>Steven G. Johnson
>
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-- 
Frederic Brossard
Hitachi Cambridge Laboratory
Cavendish Laboratory
J J Thomson Avenue
Cambridge CB3 0HE