Count and Aggregate Date in R -

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below data have:

item    date apple   09/06/2015 orange  19/06/2015 pear    01/09/2015 kiwi    20/10/2015

i count items month , year in date column in r.

below output achieve:

date       frequency 05/2015    0 06/2015    2 07/2015    0 08/2015    0 09/2015    1 10/2015    1

thank you.

just make sure have date in proper format, can use cut , table, plus formatting if want trim days,

## convert date dat$date <- as.date(dat$date, format="%d/%m/%y")  ## tabulate tab <- table(cut(dat$date, 'month'))  ## format data.frame(date=format(as.date(names(tab)), '%m/%y'),            frequency=as.vector(tab)) #      date frequency # 1 06/2015         2 # 2 07/2015         0 # 3 08/2015         0 # 4 09/2015         1 # 5 10/2015         1

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