How to find same values in an array and their index

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University 2023-11-13

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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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Answer 1

Dyuman Joshi 2023-11-13

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移动：Dyuman Joshi 2023-11-13

在 MATLAB Online 中打开

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