Convert wide data to the long format
wide_to_long(data)Data in a wide format. Must be 2D data object which can be converted to a data.frame
The data converted into long format. A data.frame with three columns item, rater and rating.
Wide data refers to a way of laying out categorical rating data
where each item is one row and each column represents the ratings of each
rater. Elements of the data can be NA, indicating that an item wasn't
rated by a rater. Wide data cannot represent the same rater rating an item
multiple times.
Currently any column names of the data are ignored and the raters are labelled by their column position (1 indexed, left to right). Only numeric ratings are currently supported.
wide_data <- data.frame(dater_1 = c(3, 2, 2), rater_2 = c(4, 2, 2))
wide_data
#> dater_1 rater_2
#> 1 3 4
#> 2 2 2
#> 3 2 2
long_data <- wide_to_long(wide_data)
long_data
#> item rater rating
#> 1 1 1 3
#> 2 1 2 4
#> 3 2 1 2
#> 4 2 2 2
#> 5 3 1 2
#> 6 3 2 2