| %notin% | The inverse of %in% |
| aggro | Aggregates a numerical column |
| count | Count the number of occurences of every unique element in a data object |
| left | Get the specified left most characters of a string |
| right | Get the specified right most characters of a string |
| round_something | The function round_something() does numerical rounding with a specified number of decimals. The 'something' will typically be a data.frame with mixed column types, of which the numerical columns must be rounded. This function makes that easier: all non-numerical columns are left in place, the numerical columns are rounded. Columns that are character but can be interpreted as numerical are first converted to numerical, and then rounded. |
| se | Standard Error |