Match matlab shift_step default, 0.5

Author: j-c-c

src/aspire/abinitio/commonline_c3_c4.py

@@ -43,7 +43,7 @@ def __init__(
         n_rad=None,
         n_theta=360,
         max_shift=0.15,
-        shift_step=1,
+        shift_step=0.5,
         epsilon=1e-2,
         max_iters=1000,
         degree_res=1,
@@ -58,10 +58,10 @@ def __init__(
 
         :param src: The source object of 2D denoised or class-averaged images with metadata
         :param symmetry: A string, 'C3' or 'C4', indicating the symmetry type.
-        :param n_rad: The number of points in the radial direction
+        :param n_rad: The number of points in the radial direction.
         :param n_theta: The number of points in the theta direction. Default = 360.
         :param max_shift: Maximum range for shifts as a proportion of resolution. Default = 0.15.
-        :param shift_step: Resolution of shift estimation in pixels. Default = 1 pixel.
+        :param shift_step: Resolution of shift estimation in pixels. Default = 0.5 pixels.
         :param epsilon: Tolerance for the power method.
         :param max_iter: Maximum iterations for the power method.
         :param degree_res: Degree resolution for estimating in-plane rotations.

src/aspire/abinitio/commonline_cn.py

@@ -41,7 +41,7 @@ def __init__(
         n_rad=None,
         n_theta=360,
         max_shift=0.15,
-        shift_step=1,
+        shift_step=0.5,
         epsilon=1e-3,
         max_iters=1000,
         degree_res=1,
@@ -61,7 +61,7 @@ def __init__(
         :param n_rad: The number of points in the radial direction.
         :param n_theta: The number of points in the theta direction. Default = 360.
         :param max_shift: Maximum range for shifts as a proportion of resolution. Default = 0.15.
-        :param shift_step: Resolution of shift estimation in pixels. Default = 1 pixel.
+        :param shift_step: Resolution of shift estimation in pixels. Default = 0.5 pixel.
         :param epsilon: Tolerance for the power method.
         :param max_iter: Maximum iterations for the power method.
         :param degree_res: Degree resolution for estimating in-plane rotations.