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2026-09-17 21:49:08 +09:00 · 2026-08-07 15:56:42 +09:00
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+% BINNING_3D - bin data along first three axis, 
+%  x = binning_3D(x, binning, centered)
+%
+%  Inputs: 
+%   **x - original array, upsampling will be performed only along the first three axis, array size has to be dividable by binning size 
+%   **binning - scalar or (3,1) array,  positive integer binning factor 
+%  *optional*
+%   **centered - default false, shift the binning by binning/2 offset 
+%
+%   returns: 
+%   ++x - binned array 
+
+%*-----------------------------------------------------------------------*
+%|                                                                       |
+%|  Except where otherwise noted, this work is licensed under a          |
+%|  Creative Commons Attribution-NonCommercial-ShareAlike 4.0            |
+%|  International (CC BY-NC-SA 4.0) license.                             |
+%|                                                                       |
+%|  Copyright (c) 2017 by Paul Scherrer Institute (http://www.psi.ch)    |
+%|                                                                       |
+%|       Author: CXS group, PSI                                          |
+%*-----------------------------------------------------------------------*
+% You may use this code with the following provisions:
+%
+% If the code is fully or partially redistributed, or rewritten in another
+%   computing language this notice should be included in the redistribution.
+%
+% If this code, or subfunctions or parts of it, is used for research in a 
+%   publication or if it is fully or partially rewritten for another 
+%   computing language the authors and institution should be acknowledged 
+%   in written form in the publication: “Data processing was carried out 
+%   using the “cSAXS matlab package” developed by the CXS group,
+%   Paul Scherrer Institut, Switzerland.” 
+%   Variations on the latter text can be incorporated upon discussion with 
+%   the CXS group if needed to more specifically reflect the use of the package 
+%   for the published work.
+%
+% A publication that focuses on describing features, or parameters, that
+%    are already existing in the code should be first discussed with the
+%    authors.
+%   
+% This code and subroutines are part of a continuous development, they 
+%    are provided “as they are” without guarantees or liability on part
+%    of PSI or the authors. It is the user responsibility to ensure its 
+%    proper use and the correctness of the results.
+
+
+
+function x = binning_3D(x, binning, centered)
+    if all(binning == 1); return ; end 
+    if nargin < 3
+        centered = false; 
+    end
+    if ismatrix(x)
+        x = utils.binning_2D(x,binning, centered);
+        return
+    end
+    binning = reshape(binning,1,[]);
+
+    assert(ndims(x) == 3, 'Input has to be 3D array')
+    assert(all(mod(size(x),binning)==0), 'Array has to splitable by binning')
+    assert(all(size(x) >binning ), 'Array has to larger than binning')
+
+    Npix = size(x); 
+    if isscalar(binning)
+        binning = repmat(binning,3,1); 
+    end
+    
+    if centered
+        % make the bins centered 
+        x = x(ceil(binning(1)/2):end-ceil(binning(1)/2)-1, ceil(binning(2)/2):end-ceil(binning(2)/2)-1,ceil(binning(3)/2):end-ceil(binning(3)/2)-1); 
+        Npix(1:3) = Npix(1:3) - reshape(binning,1,[]); 
+    end
+        
+    x = reshape(x,binning(1), Npix(1)/binning(1), binning(2), Npix(2)/binning(2), binning(3), Npix(3)/binning(3) ); 
+    x = squeeze(sum(sum(sum(x,1),3),5)); 
+    x = x / prod(binning); 
+
+end