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Re: [sicp-vsg] ex 3.75

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  • John Berthels
    ... Thanks very much. I m a little annoyed that I didn t spot that. Ah well. regards, jb
    Message 1 of 3 , Nov 15, 2005
      On 11/14/05, Ioura Batugowski <ibatugow@...> wrote:
      > The average is passed on as last-value, so it's not the average of the
      > last two values but is influenced by all previous values (with
      > exponentially decreasing contribution the older the value is). One
      > would fix it by passing (stream-car input-stream) instead of avpt as
      > last-value, but then the last-value used in the sign change detector
      > isn't smoothed. So we must pass both (stream-car input-stream) and
      > avpt to make-zero-crossings.

      Thanks very much. I'm a little annoyed that I didn't spot that. Ah well.


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