diff --git a/qec_util/performance/sampler.py b/qec_util/performance/sampler.py
index 63b68d2..340dc99 100644
--- a/qec_util/performance/sampler.py
+++ b/qec_util/performance/sampler.py
@@ -71,7 +71,7 @@ def sample_failures(
         )
     if "decode_batch" not in dir(decoder):
         raise TypeError("'decoder' does not have a 'decode_batch' method.")
-        
+
     sampler = dem.compile_sampler()
     num_failures, num_samples = 0, 0
 
diff --git a/qec_util/util/syndrome.py b/qec_util/util/syndrome.py
index 2423ef0..5fe4945 100644
--- a/qec_util/util/syndrome.py
+++ b/qec_util/util/syndrome.py
@@ -4,6 +4,21 @@
 
 
 def get_syndromes(anc_meas: DataArray) -> DataArray:
+    """Returns the syndrome outcomes from the ancilla outcomes
+    for a memory experiment.
+
+    Parameters
+    ----------
+    anc_meas
+        Ancilla outcomes for the memory experiment.
+        Expected minimum set of coordinates: ``qec_round`` and ``meas_reset``.
+
+    Returns
+    -------
+    syndromes
+        Syndrome outcomes.
+        Coordinates: same coordinates as ``anc_meas``.
+    """
     if anc_meas.meas_reset:
         return anc_meas
 
@@ -13,6 +28,23 @@ def get_syndromes(anc_meas: DataArray) -> DataArray:
 
 
 def get_defects(syndromes: DataArray, frame: Optional[DataArray] = None) -> DataArray:
+    """Returns the defects from the syndrome outcomes for a memory experiment.
+
+    Parameters
+    ----------
+    syndromes
+        Syndrome outcomes of the memory experiment.
+        Expected coordinates: ``qec_round`` and ``anc_qubit``.
+    frame
+        Initial Pauli frame of the memory experiment.
+        Expected coordinates: ``anc_qubit``.
+
+    Returns
+    -------
+    defects
+        Defects.
+        Coordinates: ``qec_round`` and ``anc_qubit``.
+    """
     shifted_syn = syndromes.shift(qec_round=1, fill_value=0)
 
     if frame is not None:
@@ -23,6 +55,24 @@ def get_defects(syndromes: DataArray, frame: Optional[DataArray] = None) -> Data
 
 
 def get_final_defects(syndromes: DataArray, proj_syndrome: DataArray) -> DataArray:
+    """Returns the defects for the final round build from the ancilla outcomes
+    and the data qubit outcomes for a memory experiment.
+
+    Parameters
+    ----------
+    syndromes
+        Syndrome outcomes from the ancilla qubits in the memory experiment.
+        Expected coordinates: ``qec_round`` and ``anc_qubit``.
+    proj_syndromes
+        Syndrome outcomes built from the data qubit outcomes.
+        Expected coordinates: ``anc_qubit``.
+
+    Returns
+    -------
+    defects
+        Defects for the stabilizers in ``proj_syndromes``.
+        Coordinates: ``anc_qubit``.
+    """
     last_round = syndromes.qec_round.values[-1]
     anc_qubits = proj_syndrome.anc_qubit.values