get_chain_starts_for

biotite.structure.get_chain_starts_for(array: AtomArray[N] | AtomArrayStack[M, N], indices: ndarray[tuple[Any], dtype[integer]] | Sequence[int]) → ndarray[tuple[Any], dtype[integer]]

For each given atom index, get the index that points to the start of the chain that atom belongs to.

Parameters:

arrayAtomArray or AtomArrayStack

The atom array (stack) to determine the chains from.

indicesndarray, dtype=int, shape=(k,)

These indices point to the atoms to get the corresponding chain starts for. Negative indices are not allowed.

Returns:

start_indicesndarray, dtype=int, shape=(k,)

The indices that point to the chain starts for the input indices.