Yet another way to solve it:










*user=> x[[1 0.5] [1 0.7] [2 1.0] [3 0.1] [3 0.1]]user=> (group-by first 
x){1 [[1 0.5] [1 0.7]], 2 [[2 1.0]], 3 [[3 0.1] [3 0.1]]}user=> (map 
#(vector (first %) (second %)) (group-by first x))([1 [[1 0.5] [1 0.7]]] [2 
[[2 1.0]]] [3 [[3 0.1] [3 0.1]]])user=> (map #(vector (first %) (reduce + 
(map second (second %)))) (group-by first x))([1 1.2] [2 1.0] [3 0.2])*

All the best,
Emrehan

On Thursday, 19 March 2015 23:57:18 UTC+2, Alex wrote:
>
> Hello everybody,
>
> How to transform sequence 
>
> *[[1 0.5] [1 0.7] [2 1.0] [3 0.1] [3 0.1]]*
>
> to
>
> *[[1 1.2] [2 1.0] [3 0.2]]*
>
> ?
>
> Best regards,
> Alex
>  
>

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