Finding the index of the largest element in a list in OCaml

Reading time ~1 minute

As far as I know, there is no implementation of argmax and argmin in the default ocaml library (or perhaps they could be called maxi for more consistency with respect to mapi). The following snippet solves it!

let argmax l =
  let rec aux max_index index max_value = function
    | [] -> max_index
    | h::t -> if h > max_value then aux index (index + 1) h t 
                         else aux max_index (index + 1) max_value t

  match l with 
  | [] -> 0
  | _ ->   aux 0 0 (List.hd l) l

Note that the defaut behavior with an empty list is to return 0 but it can be changed.

Benchmark Fossil Demand Forecasting Challenge

# IntroductionZindi is hosting the [Fossil Demand Forecasting Challenge](… Continue reading

Random number generation in Cython

Published on February 25, 2022

Vim for datascience

Published on January 09, 2022