Sum up equal variables in data frame in R keeping values in different columns
122392
Apply function conditionally
57572
Display exact value of a variable in R
4982
How to combine multiple conditions to subset a data-frame using "OR"?
3528
How to check if a variable is the same as at least one of two other variables?
90853
How can I compare multiple variables to a single condition?
152302
R compute percentage values in data frame
53310
Merge two data frames while keeping the original row order
28357
How can I sum two values and store the result in other variable?
140331
For loop in R assigning to a data frame
31517
Using awk to sum the values of a column, based on the values of another column
39641
How to split a data frame?
135919
Line plot of multiple variables in R
31519
R: subsetting data frame by both certain column names (as a variable) and field values
157280
How do I sum up specific things in Numbers?
100214
Group by multiple columns in dplyr, using string vector input
135670
Combine lists while overriding values with same name in R
146677
Create several new derived variables from existing variables in data.frame