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2011 Nov 03
2
query about counting rows of a dataframe
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I need to count data in different ways:
1. count the births for each day (having 0 when necessary) independently from the value of the "labour" column
2. count the births for each day (having 0 when necessary), divided by the value of "labour" (which can have two valuers, 1 or 2)
3. count the births for each day of all the years (i.e. the 22nd of October of all the years present in the data frame) independently from the value of "labour"
4. count the births for each day of all the years (i.e. the 22nd of October of all the years present in the data fra...