How to count the frequency of repeated values in an array of values with the index position?

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John Doe
John Doe le 28 Sep 2019
Réponse apportée : the cyclist le 28 Sep 2019
clc
clear
t=0:.001:10;
y=sin(2*pi*t);
I want to count the frequency of repeated values in 'y' . How can I do that? I also want to print out the index position where value is being repeated.
Thanks!

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the cyclist
the cyclist le 28 Sep 2019
You can do both of these things using the unique command.
Be aware, though, that due to accuracy of floating point numbers, you may not get exact repeated values when you expect them.

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