Garyfallidis new api dti

bin/fit_tensor

@@ -11,7 +11,7 @@ from dipy.io.utils import nifti1_symmat
 from dipy.io.bvectxt import read_bvec_file, orientation_to_string
 from nibabel.trackvis import empty_header, write
 
-usage = """fit_tenor [options] dwi_images"""
+usage = """fit_tensor [options] dwi_images"""
 parser = OptionParser(usage)
 parser.add_option("-b","--bvec",help="text file with gradient directions")
 parser.add_option("-r","--root",help="root for files to be saved")

dipy/core/geometry.py

@@ -24,7 +24,6 @@
 _TUPLE2AXES = dict((v, k) for k, v in _AXES2TUPLE.items())
 
 
-
 def sphere2cart(r, theta, phi):
     ''' Spherical to Cartesian coordinates
 
@@ -130,6 +129,18 @@ def cart2sphere(x, y, z):
     return r, theta, phi
 
 
+def sph2latlon(theta, phi):
+    """Convert spherical coordinates to latitude and longitude.
+
+    Returns
+    -------
+    lat, lon : ndarray
+        Latitude and longitude.
+
+    """
+    return np.rad2deg(theta - np.pi/2), np.rad2deg(phi - np.pi)
+
+
 def normalized_vector(vec, axis=-1):
     ''' Return vector divided by its Euclidean (L2) norm