查找数组中元素之间平均差的有效方法 [英] Efficient way of finding average difference between elements in array

问题描述

希望标题不会造成混淆.通过示例显示很简单.我有一个像这样的行向量:[1 5 6].我想找到每个元素之间的平均差异.在此示例中，差异为4和1，因此平均值为2.5.这是一个小例子.我的行向量可能很大.我是MatLab的新手，所以有没有一种有效的方法可以使用MATLAB的有效矩阵/数组操作很好地做到这一点?

Hope title isn't confusing. It's simple to show by example. I have a row vector like so: [1 5 6]. I want to find the average difference between each element. The differences in this example are 4 and 1 so the average is 2.5. This is a small example. My row vectors might be very large. I'm new to MatLab so is there some efficient way of using MATLAB's efficient matrix/array manipulation to do this nicely?

SOF上已经有一个类似的问题，但这是专门针对MATLAB的问题！

There is a similar question on SOF already but this question is specifically for MATLAB!

谢谢:)

@gnovice询问，我想要绝对的区别.

As queried by @gnovice, I wanted the absolute difference.

推荐答案

使用 diff 和 mean

aveDiff = mean(diff(myVector))     %#(1)

示例

>> v=[1 5 6]
v =
     1     5     6
>> mean(diff(v))
ans =
    2.5000

这可行，但是@Jonas的答案是正确的解决方案.

This works but @Jonas' answer is the correct solution.

编辑

Edit

来自@ gnovice，@ vivid-colours和@sevenless评论.

From @gnovice, @vivid-colours and @sevenless comments.

差的绝对值的平均值可以通过在(1)中插入 abs 来找到

The mean of the absolute value of the difference can be found by inserting abs into (1)

aveDiff = mean(abs(diff(myVector)))     %#(2)

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