most elegant functional way to make a histogram
Laeeth Isharc via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Fri Aug 21 14:08:24 PDT 2015
On Friday, 21 August 2015 at 20:09:22 UTC, Laeeth Isharc wrote:
> I have four arrays of ints, each array representing a kind of
> event associated with that int (they all map to the same
> space). Each array might have the same number multiple times
> and each array will be of different length.
>
> So I would like to plot the int line on x axis and show number
> of times that the number occurs for each array (4 bars for each
> int).
>
> It's easy to do with loops, but what's best
> functional/algorithmic way, please? Brain tired today. I am
> trying to use these opportunities to learn the algorithmic way
> even if loop is more natural.
>
> I could just make four new arrays of ints and use each instead
> of a loop. Any better way?
>
> Also, for bucketizing, any thoughts on best way to do using
> phobos? (Cos probably I have too many ints and need to bracket
> them to plot a histogram).
>
> Sorry if this is unclear.
I guess this kind of thing will do:
upRangeHighs.each!((ref a)=>(++histogram[a][0]));
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