Moved zero_crossings function to Taguchi module.

gprMax/utilities.py

@@ -128,18 +128,3 @@ def human_size(size, a_kilobyte_is_1024_bytes=True):
     raise ValueError('Number is too large.')
 
 
-def zero_crossings(data):
-    """Find location of zero crossings in 1D data array.
-        
-    Args:
-        data (float): 1D array
-        
-    Returns:
-        Array of indices (int).
-    """
-    
-    pos = data > 0
-    npos = ~pos
-    return ((pos[:-1] & npos[1:]) | (npos[:-1] & pos[1:])).nonzero()[0]
-
-