Merge data sets by row differening columns
32937
Combine two data frames by rows (rbind) when they have different sets of columns
73700
How do I transpose data in columns to rows?
106330
Merge files based on matching of first column
158428
Duplicating a column vector into a longer column vector
35328
Creating tables with spanning rows/columns
53145
Table with multiple merging
69548
Simultaneously fitting multiple datasets
46441
Combine column from multiple rows into single row
53053
Transforming multiple rows into a single row
25072
Merging CSV (single line per row) files without losing the header line
33487
R aggregate data in one column based on 2 other columns
8801
Can I combine the results from multiple columns into a single column without UNION?
31491
Merge many data frames from csv files, when ID column is implied?
105683
Ordering Merged data frames
144100
How to merge two files in corresponding row?
37373
Reshape three column data frame to matrix ("long" to "wide" format)
104654
Transpose N rows with different columns into single column