query: Create several new, similar variables from existing variables in data.frame
positive_passages.docid: 146677
positive_passages.text: Create several new derived variables from existing variables in data.frame
negative_passages.docid: 25066
negative_passages.text: Adding a new column to each element in a list of tables or data frames
negative_passages.docid: 6493
negative_passages.text: Repeat each row of data.frame the number of times specified in a column
negative_passages.docid: 87266
negative_passages.text: Apply several summary functions on several variables by group in one call
negative_passages.docid: 21821
negative_passages.text: Reshaping multiple sets of measurement columns (wide format) into single columns (long format)
negative_passages.docid: 133468
negative_passages.text: Assign zeros to large list of indexed variables
negative_passages.docid: 113624
negative_passages.text: Create multiple numbered variables based on a int
negative_passages.docid: 132210
negative_passages.text: How to assign a counter to a specific subset of a data.frame which is defined by a factor combination?
negative_passages.docid: 40942
negative_passages.text: Conditional merge/replacement in R
negative_passages.docid: 4982
negative_passages.text: How to combine multiple conditions to subset a data-frame using "OR"?
negative_passages.docid: 26303
negative_passages.text: Add a new column between other dataframe columns
negative_passages.docid: 32937
negative_passages.text: Combine two data frames by rows (rbind) when they have different sets of columns
negative_passages.docid: 145742
negative_passages.text: Repeat rows of a data.frame N times
negative_passages.docid: 151542
negative_passages.text: How does one reorder columns in a data frame?
negative_passages.docid: 73992
negative_passages.text: Assigning values to a list of variable names
negative_passages.docid: 57688
negative_passages.text: How to name a variable with the value of another variable?
negative_passages.docid: 155361
negative_passages.text: Split data.frame by value