How do I create a column containing aggregated means with R?
96906
Calculating statistics on subsets of data
3665
Standard error clustering in R (either manually or in plm)
54914
Simulate AR(1) process in R with specified nonzero mean and AR coefficient
12051
Add column with counts of another
140337
Using an aggregate function in where
12697
Clustering of mixed type data with R
38829
Calculate the mean by group
61488
Moving columns within a data.frame() without retyping
72060
Frequency counts in R
144137
Add max value to a new column in R
29320
How can I perform this aggregate?
17407
Multiple aggregations of the same column using pandas GroupBy.agg()
56436
Creating co-occurrence matrix
50752
Linear Regression and group by in R
109196
dispersion in summary.glm()
77924
Average rows with same first column
118325
R: Split unbalanced list in data.frame column