The structure file format supports an optional 2nd column to indicate (with integer values) the a priori population from which each sample was obtained (e.g. sampling site). In ipyrad if the user includes a pop_assign_file, then we could use this to populate this column.
The structure file format supports an optional 2nd column to indicate (with integer values) the a priori population from which each sample was obtained (e.g. sampling site). In ipyrad if the user includes a pop_assign_file, then we could use this to populate this column.