I want to generate statevectors from the underlying measured bitstrings. What order are the bitstring arrays returned as? That is, is `[1, 0, 0, 0] = '1000'`

or `'0001'`

?

Hey @cuhrazatee!

The following circuit provides PennyLane code to check:

```
import pennylane as qml
from pennylane import numpy as np
n_wires = 4
dev = qml.device("default.qubit", wires=n_wires, shots=10)
@qml.qnode(dev)
def samples(bitstring):
qml.BasisState(bitstring, wires=range(n_wires))
return [qml.sample(qml.PauliZ(i)) for i in range(n_wires)]
b = [1, 1, 0, 0]
```

You can see that evaluating this circuit gives:

```
>>> samples(b).T
array([[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1],
[-1, -1, 1, 1]])
```

The output samples have values `1`

and `-1`

. The `1`

corresponds to the `+1`

eigenstate of the Pauli matrix \sigma_{z}, which is |0\rangle. The `-1`

corresponds to the `-1`

eigenstate of \sigma_{z}, which is |1\rangle. In other words, in the above `-1`

maps to |1\rangle and `1`

maps to |0\rangle.

Hence, we see that for qubit i corresponds to the i-th column of `samples(b).T`

.