From 5c61236047e0b238fd0bf395e27cf4184a54efbd Mon Sep 17 00:00:00 2001
From: goktugsina <sinabekcioullari@gmail.com>
Date: Tue, 31 Mar 2026 13:14:45 +0300
Subject: [PATCH 1/2] feat: add basic trajectory metrics

---
 movement/kinematics/__init__.py           | 1 +
 movement/kinematics/trajectory_metrics.py | 7 +++++++
 tests/test_trajectory_metrics.py          | 6 ++++++
 3 files changed, 14 insertions(+)
 create mode 100644 movement/kinematics/trajectory_metrics.py
 create mode 100644 tests/test_trajectory_metrics.py

diff --git a/movement/kinematics/__init__.py b/movement/kinematics/__init__.py
index 7216a367d..bdcaaa8f7 100644
--- a/movement/kinematics/__init__.py
+++ b/movement/kinematics/__init__.py
@@ -33,3 +33,4 @@
     "compute_forward_vector_angle",
     "compute_kinetic_energy",
 ]
+from .trajectory_metrics import trajectory_length, trajectory_variance
\ No newline at end of file
diff --git a/movement/kinematics/trajectory_metrics.py b/movement/kinematics/trajectory_metrics.py
new file mode 100644
index 000000000..1fb0f2d59
--- /dev/null
+++ b/movement/kinematics/trajectory_metrics.py
@@ -0,0 +1,7 @@
+import numpy as np
+
+def trajectory_length(traj):
+    return np.sum(np.linalg.norm(np.diff(traj, axis=0), axis=1))
+
+def trajectory_variance(traj):
+    return np.var(traj, axis=0).sum()
\ No newline at end of file
diff --git a/tests/test_trajectory_metrics.py b/tests/test_trajectory_metrics.py
new file mode 100644
index 000000000..ac2afcf74
--- /dev/null
+++ b/tests/test_trajectory_metrics.py
@@ -0,0 +1,6 @@
+import numpy as np
+from movement.kinematics.trajectory_metrics import trajectory_length
+
+def test_trajectory_length():
+    traj = np.array([[0, 0], [3, 4]])
+    assert trajectory_length(traj) == 5.0
\ No newline at end of file

From f4b0853d588bedf3d606aefac51dae72d2744f5f Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Tue, 31 Mar 2026 10:22:04 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 movement/kinematics/__init__.py           | 2 +-
 movement/kinematics/trajectory_metrics.py | 4 +++-
 tests/test_trajectory_metrics.py          | 4 +++-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/movement/kinematics/__init__.py b/movement/kinematics/__init__.py
index bdcaaa8f7..415d45d44 100644
--- a/movement/kinematics/__init__.py
+++ b/movement/kinematics/__init__.py
@@ -33,4 +33,4 @@
     "compute_forward_vector_angle",
     "compute_kinetic_energy",
 ]
-from .trajectory_metrics import trajectory_length, trajectory_variance
\ No newline at end of file
+from .trajectory_metrics import trajectory_length, trajectory_variance
diff --git a/movement/kinematics/trajectory_metrics.py b/movement/kinematics/trajectory_metrics.py
index 1fb0f2d59..6b016dad7 100644
--- a/movement/kinematics/trajectory_metrics.py
+++ b/movement/kinematics/trajectory_metrics.py
@@ -1,7 +1,9 @@
 import numpy as np
 
+
 def trajectory_length(traj):
     return np.sum(np.linalg.norm(np.diff(traj, axis=0), axis=1))
 
+
 def trajectory_variance(traj):
-    return np.var(traj, axis=0).sum()
\ No newline at end of file
+    return np.var(traj, axis=0).sum()
diff --git a/tests/test_trajectory_metrics.py b/tests/test_trajectory_metrics.py
index ac2afcf74..801052d65 100644
--- a/tests/test_trajectory_metrics.py
+++ b/tests/test_trajectory_metrics.py
@@ -1,6 +1,8 @@
 import numpy as np
+
 from movement.kinematics.trajectory_metrics import trajectory_length
 
+
 def test_trajectory_length():
     traj = np.array([[0, 0], [3, 4]])
-    assert trajectory_length(traj) == 5.0
\ No newline at end of file
+    assert trajectory_length(traj) == 5.0