计算F#中序列的后续元素的差异 [英] Calculating differences of subsequent elements of a sequence in F#

问题描述

我在F#中有一个浮点数序列，我需要获得一个定义为(Math.Log currentElement)/(Math.Log previousElement)的序列.显然，它将比原始序列短一个元素.

I have a sequence of floats in F#, and I need to get a sequence defined of (Math.Log currentElement)/(Math.Log previousElement). Obviously it will be shorter than the original sequence by one element.

在F#中实现这一目标的最优雅的方法是什么?我当时想在内部使用带for循环的seq {}表达式，但是即使那样，以一种相当不错的方式处理第一个元素似乎还是困难的……

What is the most elegant way to achieve this in F#? I was thinking to use a seq{} expression with a for loop inside, but even then handling the first element in a reasonably nice way seems difficult...

推荐答案

items |> Seq.pairwise |> Seq.map (fun (x, y) -> log y / log x)

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