Combining multiple data frames with different number of columns
32937
Combine two data frames by rows (rbind) when they have different sets of columns
37373
Reshape three column data frame to matrix ("long" to "wide" format)
17403
Read all files in a folder and apply a function to each data frame
26294
Combine two columns into a list of all possible combinations of entries
25066
Adding a new column to each element in a list of tables or data frames
119838
Read multiple CSV files into separate data frames
97936
How to merge two files based on the matching of two columns?
139048
Different column widths using multicol
135319
Convert the values in a column into row names in an existing data frame
19009
Combining two lists of different dimensions into a list of all combinations of points?
61885
Multiple histograms in ggplot2
94314
align columns in multiple tables
158428
Duplicating a column vector into a longer column vector
2057
Insert data from multiple rows into multiple columns
151542
How does one reorder columns in a data frame?
58090
Drop unused factor levels in a subsetted data frame
102482
Transpose a data frame