i have a matrix A of size 523418*2, i want to delete repeating pair?? as i explained below. any help??

1 次查看（过去 30 天）

显示更早的评论

M.Prasanna kumar 2019-2-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/443295-i-have-a-matrix-a-of-size-523418-2-i-want-to-delete-repeating-pair-as-i-explained-below-any-help

评论： Guillaume 2019-2-5

采纳的回答： Guillaume

a = [ 1 2 ; 2 1 ; 2 3 ; 5 2 ]

a =

1 2

2 1

2 3

5 2

i used following two logics,but neither gives my answer

>> uniqueresult = unique(sort(a,2), 'rows');

uniqueresult = unique(sort(a,2), 'rows','stable');

but this gives as following

uniqueresult =

1 2

2 3

2 5

but i want as

uniqueresult =

1 2

2 3

5 2

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Guillaume 2019-2-5

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/443295-i-have-a-matrix-a-of-size-523418-2-i-want-to-delete-repeating-pair-as-i-explained-below-any-help#answer_359584

在 MATLAB Online 中打开

[~, tokeep] = unique(sort(a, 2), 'rows', 'stable');  %stable optional if you don't care about the ROW ordering
result = a(tokeep, :)

2 个评论
显示无隐藏无

M.Prasanna kumar 2019-2-5

Thank you so much sir for spending your time. I got the result

Sir, can you please explain what is [~, tokeep]

Guillaume 2019-2-5

~ means don't care about that output (the first one). We only keep about the second output, which is the index of the unique rows (the one you want to keep).

请先登录，再进行评论。

类别

AI, Data Science, and Statistics Deep Learning Toolbox Image Data Workflows

在 Help Center 和 File Exchange 中查找有关 Image Data Workflows 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by