Remove duplicate 1s from matrix columns

Question

Mitchell Crem 2021-1-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/725882-remove-duplicate-1s-from-matrix-columns

评论： Image Analyst 2021-1-25

Suppose I have the following logical matrix,

qq =
  3×5 logical array
   1   0   1   1   1
   1   1   0   1   1
   1   0   0   0   1

I'm trying to write a few lines which would allow me to set each column to possess only a single 1 by setting additional 1s to 0. The output should look like the following.

qq =
  3×5 logical array
   1   0   1   1   1
   0   1   0   0   0
   0   0   0   0   0

:)

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Answer 1

Image Analyst 2021-1-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/725882-remove-duplicate-1s-from-matrix-columns#answer_605383

在 MATLAB Online 中打开

Mitchell, try this:

qq = logical([...
   1   0   1   1   1
   1   1   0   1   1
   1   0   0   0   1])
[rows, columns] = size(qq);
for col = 1 : columns
	highestOne = find(qq(:, col), 1, 'first');
	if ~isempty(highestOne)
		qq(highestOne + 1 : end, col) = false;
	end
end
qq % Show in command window.