if you want to output the value to an hdf5 file, I guess you can use:
(in-volume (volume (center 0 0 0) (size 0 0 0)) (at-end
output-efield-x))

On Fri, 2007-01-12 at 13:30 -0500, Huazhong Wang wrote:

> hi,
> 
> i want to take out the Ex at point (0 0 0) after running. my code is below:
> 
> ...
> (define (myfun Ex) (get-field-point Ex (vector3 0 0 0)))
> ...
> (run-util 100
> (at-end (output-field-function "Ex" (list Ex) myfun))
> )
> ...
> 
> but meep stops running, its response is: Error: wrong number of 
> arguments to #<procedure myfun(Ex)>
> 
> i am confued here. who can tell me why?
> 
> thanks
> 
> 
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