[R] Mathematical working procedure of duplicated() function in r

[K Purna Prakash]

Dear Sir(s),
I request you to provide the detailed* internal mathematical working
mechanism of the following function *for better understanding.
*x[duplicated(x) | duplicated(x, fromLast=TRUE), ]*
I am having some confusion in understanding how duplicates are being
identified when thousands of records are there.
I will look for a positive response.
Thank you,
K.Purna Prakash.

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