How to find same values in an array and their index

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?

Answer 1

[Dyuman Joshi]

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

[University]

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?