How can I calculate mean per group in a data frame

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May 24, 2018 in Data Analytics by shams
 • 3,670 points • 3,947 views

1 answer to this question.

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You can use aggregate function for calculating mean per group.

aggregate(d[, a:b], list(d$Name), mean)
Here we will calculate the aggregate of some columns a and b of dataframe d, grouping by d$Name, and applying the mean function.

answered May 24, 2018 by zombie
 • 3,790 points

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