Count values from a table

General
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1

Hi people!

I have the following Table (named "tabela").
The collum "corrida" is the first six numbers of the collum "indicado".
I need to count the number of equal (identical) rows in "corrida" and store in a variable.

How can I do this?

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2 
table(tabela$corrida)
3

You can use n_distinct() from dplyr: