Unlists the Values in a Rectangular Dataset by Row or Column

Source: R/unlist_by_row.R

Unlists the values in a rectangular dataset (like a matrix, data.frame, or data.table) by row.

unlist_by_row(indt, source = TRUE)

unlist_by_col(indt, source = TRUE)

Arguments

indt

The input dataset.
source

Logical. Should columns indicating the original row and column positions be returned. Defaults to TRUE.

Value

A data.table if source = TRUE or a vector.

References

http://stackoverflow.com/q/36073947/1270695

Author

Ananda Mahto

Examples


unlist_by_row(mtcars)
#>      row col value
#>   1:   1   1  21.0
#>   2:   1   2   6.0
#>   3:   1   3 160.0
#>   4:   1   4 110.0
#>   5:   1   5   3.9
#>  ---              
#> 348:  32   7  18.6
#> 349:  32   8   1.0
#> 350:  32   9   1.0
#> 351:  32  10   4.0
#> 352:  32  11   2.0


unlist_by_col(mtcars)
#>      row col value
#>   1:   1   1  21.0
#>   2:   2   1  21.0
#>   3:   3   1  22.8
#>   4:   4   1  21.4
#>   5:   5   1  18.7
#>  ---              
#> 348:  28  11   2.0
#> 349:  29  11   4.0
#> 350:  30  11   6.0
#> 351:  31  11   8.0
#> 352:  32  11   2.0