WIP: Add GSN-HydroCel-129

mne/channels/_standard_montage_utils.py

@@ -132,6 +132,36 @@ def get_hydrocel_128():
     )
 
 
+def get_hydrocel_129():
+    fname = op.join(MONTAGE_PATH, 'GSN-HydroCel-129.sfp')
+
+    LPA_CH_NAME = 'FidT9'
+    NASION_CH_NAME = 'FidNz'
+    RPA_CH_NAME = 'FidT10'
+    with open(fname, 'r') as f:
+        lines = f.read().replace('\t', ' ').splitlines()
+
+    ch_names_, pos = [], []
+    for ii, line in enumerate(lines):
+        line = line.strip().split()
+        if len(line) > 0:  # skip empty lines
+            if len(line) != 4:  # name, x, y, z
+                raise ValueError("Malformed .sfp file in line " + str(ii))
+            this_name, x, y, z = line
+            ch_names_.append(this_name)
+            pos.append([float(cord) for cord in (x, y, z)])
+    pos = np.asarray(pos)
+
+    ch_pos = dict(zip(ch_names_, pos))
+    nasion = ch_pos.pop(NASION_CH_NAME).reshape(3, )
+    lpa = ch_pos.pop(LPA_CH_NAME).reshape(3, )
+    rpa = ch_pos.pop(RPA_CH_NAME).reshape(3, )
+
+    return make_dig_montage(
+        ch_pos=ch_pos, nasion=nasion, lpa=lpa, rpa=rpa, coord_frame='unknown',
+    )
+
+
 def read_standard_montage(kind):
     if kind == 'EGI_256':
         dig_montage_A = get_egi_256()
@@ -142,6 +172,8 @@ def read_standard_montage(kind):
         dig_montage_A = get_easycap_M10()
     elif kind == 'GSN-HydroCel-128':
         dig_montage_A = get_hydrocel_128()
+    elif kind == 'GSN-HydroCel-129':
+        dig_montage_A = get_hydrocel_129()
 
     else:
         montage = read_montage(kind)  # XXX: reader needs to go out!
@@ -154,5 +186,3 @@ def read_standard_montage(kind):
         # dig_montage_B is to create RawArray(.., montage=montage)
 
     return dig_montage_A
-
-

mne/channels/tests/test_standard_montage.py

@@ -195,8 +195,8 @@ def test_read_standard_montage_egi_256():
     # 'EGI_256',
     # 'easycap-M1',
     # 'easycap-M10'
-    'GSN-HydroCel-128',
-    # 'GSN-HydroCel-129',
+    # 'GSN-HydroCel-128',
+    'GSN-HydroCel-129',
     # 'GSN-HydroCel-256',
     # 'GSN-HydroCel-257',
     # 'GSN-HydroCel-32',
@@ -219,7 +219,7 @@ def test_read_standard_montage_egi_256():
 ])
 def test_foo(kind):
     """Test difference between old and new standard montages."""
-    # import pdb; pdb.set_trace()
+    import pdb; pdb.set_trace()
     mont = read_montage(kind)
     digm = read_standard_montage(kind)
     eeg_loc = np.array([ch['r'] for ch in _get_dig_eeg(digm.dig)])
@@ -247,6 +247,18 @@ def test_hydrocell_128():
         assert_array_equal(actual[kk], expected[kk])
 
 
+def test_hydrocell_129():
+    """Test difference between old and new standard montages."""
+    mont = read_montage('GSN-HydroCel-128')
+    digm = read_standard_montage('GSN-HydroCel-128')
+    eeg_loc = np.array([ch['r'] for ch in _get_dig_eeg(digm.dig)])
+
+    # Assert we are reading the same thing. (notice dig reorders chnames)
+    actual = dict(zip(digm.ch_names, eeg_loc))
+    expected = dict(zip(mont.ch_names, mont.pos))
+    for kk in actual:
+        assert_array_equal(actual[kk], expected[kk])
+
 def test_easycaps_are_indeed_different():
     """Test something fishy with easycaps."""
     m1 = read_montage('easycap-M1')