create aggregate column based on variables with R
96906
Calculating statistics on subsets of data
125441
How to select the rows with maximum values in each group with dplyr?
29320
How can I perform this aggregate?
146692
Need to sum of last column based on pipe delimiter
137286
stacking columns in data.frame into one column in R
120298
When importing CSV into R how to generate column with name of the CSV?
158497
reshape dataframe based on a string split in one column in R
140337
Using an aggregate function in where
50752
Linear Regression and group by in R
155343
Select multiple (non-aggregate function) columns with GROUP BY
89743
Split data.frame based on levels of a factor into new data.frames
31519
R: subsetting data frame by both certain column names (as a variable) and field values
147397
How do I combine two data-frames based on two columns?
71903
Frequency count of two column in R
74315
Constraint on variables in summation
112425
Calculating the average of variably sized blocks of numbers within a column?
38616
Clusering based on categorical variables?