The general issue is detailed in the issue, but summarized:
Something (not sure exactly) caused ret_index to become a list rather than a vector, which caused an error when order(ret_index) was called in the return statement.
This PR rectifies that by explicitly ordering by iterating over ret_index and setting the FIPSs into a result vector.
This PR is required for #15.
The general issue is detailed in the issue, but summarized:
ret_indexto become a list rather than a vector, which caused an error whenorder(ret_index)was called in the return statement.ret_indexand setting the FIPSs into a result vector.