How to find same values in an array and their index

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University
University 2023-11-13
评论： University 2023-11-13
Hi,
I have array with some repeated values. I have 1e-6 repeatedly. How can I have find all the values and their corresponding index?

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回答（1 个）

Dyuman Joshi
Dyuman Joshi 2023-11-13
移动：Dyuman Joshi 2023-11-13
Ran in:
arr = load('array.mat')
arr = struct with fields:
yintercept: [100×2 double]
mat = arr.yintercept
mat = 100×2
1.0e-06 * 1.0000 0 1.0000 0 1.0000 0 0.1280 1.0000 0.1300 1.0000 0.1319 1.0000 0.1338 1.0000 0.1357 1.0000 0.1375 1.0000 0.1393 1.0000
val = 1e-6;
%As you are dealing with floating point numbers, use tolerance to compare
[r, c] = find(abs(mat-val)<1e-9)
r = 100×1
1 2 3 18 25 39 41 42 43 44
c = 100×1
1 1 1 1 1 1 1 1 1 1
  1 个评论
University
University 2023-11-13
Thanks for your response. Sorry I attached a wrong array. I have 1e-6 repeatedly. How can I have find all the values and their corresponding index?

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