How to get the frequency of a column of values
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I have a column of data containing the study year of the sampling stations:
1950
1953
1953
1953
1957
1957
1959
1959
1959
1959
...
I want to plot something like histogram myself.
How do I get a two column data, with the left column containing all the possible years, and the right column containing their frequencies?
1950, 1
1953, 3
1957, 2
1959, 4
Thanks.
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