How to find indices of value that are greater than zero and less than 5

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Arsal15 2016-2-15

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https://ww2.mathworks.cn/matlabcentral/answers/268215-how-to-find-indices-of-value-that-are-greater-than-zero-and-less-than-5

评论： Image Analyst 2016-2-16

采纳的回答： Star Strider

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I want to find the indices of a matrix and I am using this command.

if true
  nhd = find(dist_mat1>0 & dist_mat1<6);
end
It is giving me a single column matrix. Is it possible that it can find the indices of all elements from first row, then second and then third. so that I have output variable index has three rows and each value in row shows the column number only.

like nhd = [1,3,4,7;1,2,3,6,7;1,4]

Is it possible ?

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采纳的回答

Star Strider 2016-2-15

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This works:

dist_mat1 = randi([0 7], 3, 7);                     % Create Matrix
[RowNrs,ColNrs] = find(dist_mat1>0 & dist_mat1<6);
[RowNrSort, Idx] = sort(RowNrs);
for k1 = 1:max(RowNrs)
    Out{k1} = ColNrs(Idx(RowNrSort == k1));
end

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Star Strider 2016-2-15

I am not quite certain what you want to do.

The unique function — possibly with more than one output — could be an option.

Image Analyst 2016-2-16

If they're all integers, maybe take the histogram and find the bin where the count is the number of arrays you examined, which would mean that number was in each of the arrays you examined.

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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