Convert Index values from "find" function into coordinates.

34 次查看（过去 30 天）
Sean Farrell
Sean Farrell 2017-1-28
评论： Jos (10584) 2018-2-23
Hello! I am using the find function in my code. If I want to find where all the 2's are in a matrix, suppose, this function will spit out the indices of all the 2 values, but it does so in an interesting way:
a =
1 1 2 1
1 1 1 1
1 1 2 1
1 2 1 1
Now, if I implement the function, find(a==2), I get:
ans =
8
9
11
Notice how it counts down each row until it reaches a 2. I would like a coordinate instead; I would like a (row,column) coordinate. Any ideas on how I can do this using the find function?
Much appreciated! Sean

请先登录，再回答此问题。

回答（1 个）

Jan
Jan 2017-1-28
编辑：Jan 2017-1-28
When you have a question concerning a specific command, reading the corresponding docs helps. See doc find :
[row, col] = find(a == 2)
:-)
  5 个评论
显示 3更早的评论
Stephen23
Stephen23 2018-2-23
编辑：Stephen23 2018-2-23
@Daniel Garside: use ind2sub:
[R,C,P,...] = ind2sub(size(A),find(A==2))
Jos (10584)
Jos (10584) 2018-2-23
And without specifying the number of dimensions:
[subI{1:ndims(A)}] = ind2sub(size(A), find(A==2))

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by