在MATLAB中找到向量和单元数组的交集

Question

我有一个向量，让我说as=[1 3 4]我有30 by 30个单元格数组。我想检查向量as的元素是否与每个单元格的元素相交？如果是这样，我想找到单元格的索引。

Answer 1

假设cellarr是输入单元格数组，请查看此方法是否适用于您 -

%// Find intersecting elements for each cell
int_idx = cellfun(@(x) intersect(x,as),cellarr,'UniformOutput', false)

%// Find non empty cells that denote intersecting cells.
%// Then, find their row and column indices
[row_ind,col_ind] = find(~cellfun('isempty',int_idx))

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使用ismember查找每个单元格之间匹配的另一种方法，如果单元格内有any匹配，请找到它的索引 -

[row_ind,col_ind] =find(cell2mat(cellfun(@(x) any(ismember(x,as)),cellarr,'un', 0)))

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另一个 -

%// Vertically concatenate all numeric array from cells
vertcat_cells = vertcat(cellarr{:})

%// Get all good matches
matches = any(any(bsxfun(@eq,vertcat_cells,permute(as,[1 3 2])),2),3)

%// Reshape matches into the size of cellarr and get indices of matches
[row_ind,col_ind] = find(reshape(matches,size(cellarr)))