Matlab中的整数列表的汉明权重 [英] Hamming weight for a list of integers in Matlab

问题描述

一个简单的问题:我有一个整数列表，例如，

Quite a simple problem: I have a list of integers, e.g.,

 a = [7 8]

现在我想要一个单独的列表，其中包含汉明重量(即汉明重量) 列表中每个整数的二进制表示形式的1位数字).这意味着上面的整数列表的结果应如下所示:

Now I want to have a seperate list, that contains the Hamming Weight (that is the number of 1 bits in the binary represenation) for each of the integers in the list. That means the result for the integer list above should look as follows:

 res = [3 1]

有人知道我如何快速做到这一点吗?

Anyone an idea how I could do this quickly?

推荐答案

这有点棘手，但可以:

res = sum( dec2bin(a).' == '1' );

它将a转换为二进制表示形式，查看该表示形式中有多少字符是'1'，然后将这些数字相加.

It converts a to binary representation, looks at how many characters in that representation are '1', and sums up those numbers.

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