如何在单元格数组matlab中找到一行的子项? [英] how to find subitems of a row in cell array matlab?

问题描述

我的单元格如下:

S{1} = [10,20,30,40,50];
S{2} = [10,20,40,50];
S{3} = [10,50,510];
S{4} = [10,20,70,40,60];
S{5} = [20,40];

并且，我需要找到属于以下子项的单元格行:

and, i need to find rows of cell that are subitem of:

[10,20,30,40,50,60]

对于上面的示例结果是:

for above example result is :

1,2,5 

因为第1行，第2行和第5行仅具有[10,20,30,40,50,60]子项.

because row 1 and row 2 and and row 5 only have subitems of [10,20,30,40,50,60] .

很大.我需要一个快速的代码.

in my work cell array is big. and i need a fast code.

推荐答案

让我们

S{1} = [10,20,30,40,50];
S{2} = [10,20,40,50];
S{3} = [10,50,510];
S{4} = [10,20,70,40,60];
S{5} = [20,40];            % data
t = [10,20,30,40,50,60];   % target values

然后，您可以应用 ismember 和 all 到每个单元格的内容/es.mathworks.com/help/matlab/ref/cellfun.html"rel =" nofollow noreferrer> cellfun .结果是一个逻辑向量，您可以使用 find从中获得所需的索引:

Then, you can apply ismember and all to each cell's contents via cellfun. The result is a logical vector, from which you obtain the desired indices with find:

result = find(cellfun(@(x) all(ismember(x, t)), S));

另一种方法(我不知道哪种情况会更快速)是通过使用 any :

An alternative (I don't know which one will be faster in your case) is to replace ismember by computing all pairwise comparisons with bsxfun and then applying any:

result = find(cellfun(@(x) all(any(bsxfun(@eq, t(:), x(:).'), 1)), S));

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