Summarizing multiple columns with dplyr?
24411
Aggregate / summarize multiple variables per group (e.g. sum, mean)
8801
Can I combine the results from multiple columns into a single column without UNION?
136871
R use ddply or aggregate
26176
Split itemize into multiple columns
17407
Multiple aggregations of the same column using pandas GroupBy.agg()
147397
How do I combine two data-frames based on two columns?
90847
Split column at delimiter in data frame
50752
Linear Regression and group by in R
96679
Group By Multiple Columns
149949
How to create multiple rows combining data sets
106186
How to analyze data with more than one associated categorical dependent variables?
61488
Moving columns within a data.frame() without retyping
81170
How to replace NA with mean by group / subset?
76830
How can correlate against multiple columns using ddply?
26452
Summing data from column in the Attribute table
43607
Summarizing column in QGIS field calculator?
73700
How do I transpose data in columns to rows?