dividing a diagonal matrix into same and different diagonal elements

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I have a diagonal matrix as:
V = [ 0.0001 0 0 0 0;
0 0.0001 0 0 0;
0 0 3.6388 0 0;
0 0 0 5.3610 0;
0 0 0 0 6.0004];
I want to find the number of diagonal elements which are same in values. 2ndly I want to separate them in a variable, how will I do it? Here V is a 5x5 matrix, but it may be any square size matrix in general.

Answers (1)

Dyuman Joshi
Dyuman Joshi on 16 May 2021
Edited: Dyuman Joshi on 16 May 2021
%This will give the diagonal elements in a separate variable.
z = diag(V);
%Finding the number of repeated values
y = unique(z);
n = histc(z,y);
x = n(n>1); %If there are more than 1 repeating values, answer will be an array
a = y(n>1); %Get the variables that are repeated
  3 Comments
Dyuman Joshi
Dyuman Joshi on 17 May 2021
Edited: Dyuman Joshi on 17 May 2021
I tested the function as stand-alone by giving it V1 as input and it works fine. This probably what you also said. Not sure why it doesn't run in your code. I am evaluating your code and will update here.
Dyuman Joshi
Dyuman Joshi on 17 May 2021
Is it necessary to use functions? Your code is not the optimised way to write functions.

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