识别单元格阵列中的唯一性 [英] Identifying uniques in a cell array

问题描述

我在 MATLAB 中有一个45x2的单元格，第一列是任意大小的矩阵加倍.

I have a 45x2 cell in MATLAB, with the first column an arbitrarily sized matrix of doubles.

其中一些矩阵是重复的，而其他则不重复.我试图仅去除唯一的矩阵(但记录重复的次数)，并保持第二列不变.

Some of these matrices are repeated, whilst others aren't. I'm attempting to strip out only the unique matrices (but recording the number of repeates), and keep the second column as is.

我已经尝试了许多方法(制表，历史等)，但是由于细胞结构(我认为)，它们都失败了.如果不逐一遍历每个人，该如何去做呢?

I've tried a number of things (tabulate, hist et al) but they all fail because of the cell structure (I think). How would one go about doing this, short of looping through each of them individually?

推荐答案

如果将矩阵转换为字符串，则可以在它们上运行唯一的字符串:

If you convert your matrices to strings, you can run unique on them:

%# create a sample cell array
mc = {magic(3);magic(4);magic(4);magic(5);magic(3);magic(4)}

%# convert to strings
mcs = cellfun(@(x)(mat2str(x)),mc,'uniformoutput',false);

%# run unique
[uniqueCells,idxOfUnique,idxYouWant] = unique(mcs);

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