I don't recall a histogram-like method, though I may just be forgetting.
(defn frequencies [coll]
(reduce
(fn [map val] (assoc map val (inc (get map val 1))))
{}
coll))
On Thu, Dec 11, 2008 at 9:33 AM, Dave Griffith
<[EMAIL PROTECTED]> wrote:
>
>
> (defn frequencies [coll]
> (reduce (fn [map val] (assoc map val (if (contains map val)
> (get map val) 1)) #{})
> )
>
> On Dec 11, 9:21 am, bOR_ <[EMAIL PROTECTED]> wrote:
>> Hi all,
>>
>> I thought I remembered there was a method in the api somewhere that
>> would count the frequency of each unique item in a collection, but I
>> can't find it anymore. What would be a brief way to write that in
>> clojure?
>>
>> (In ruby: array.inject(Hash.new(0)) {|hash,key| hash[key] += 1 ;
>> hash})
> >
>
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To post to this group, send email to clojure@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
-~----------~----~----~----~------~----~------~--~---
