# Permutation Options in ‘gscramble’

When using the function `segments2markers()` there are two options that control the type of permutation of genetic data that is done:

- `preserve_individuals`, which can take values of `FALSE`, `"BY_CHROM"` or `TRUE`, and
- `preserve_haplotypes`, which takes the values of `FALSE` or `TRUE`.

The different values of these options can be applied together to yield \(3 \times 2 = 6\) different permutation patterns as displayed in the figure below.

Genetic material is always permuted only among members of the same population.

Need to say more, but the result of different options is pretty clear.

You should only use `preserve_haplotypes = TRUE` if the data are phased.