On 16 July 2010 20:57, Isaac Hodes <iho...@mac.com> wrote:
> I am trying to create a lazy/functional/efficient/Clojuresque function
> to carry out convolution on two lists/vectors of (ideally BigDecimals
> but that may be inefficient) doubles.
Perhaps something like this?
(defn convolve [ns ms]
(loop [nums (for [[i n] (indexed ns)
[j m] (indexed ms)] [(+ i j) (+ n m)])
y (transient (vec (repeat (+ (count ns) (count ms)) 0)))]
(if-let [[i s] (first nums)]
(recur (next nums) (assoc! y i (+ (y i) s)))
(persistent! y))))
- James
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