You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: spm_transverse.m
    path of file: ./repos/spm12
    
    the code of the file until where you have to start completion: function spm_transverse(varargin)
% Rendering of regional effects [SPM{T/F}] on transverse sections
% FORMAT spm_transverse('set',SPM,hReg)
% FORMAT spm_transverse('setcoords',xyzmm)
% FORMAT spm_transverse('clear')
%
% SPM    - structure containing SPM, distribution & filtering details
%          about the excursion set (xSPM)
%        - required fields are:
% .Z     - minimum of n Statistics {filtered on u and k}
% .STAT  - distribution {Z, T, X or F}     
% .u     - height threshold
% .XYZ   - location of voxels {voxel coords}
% .iM    - mm  -> voxels matrix
% .VOX   - voxel dimensions {mm}
% .DIM   - image dimensions {voxels}
%
% hReg   - handle of MIP XYZ registry object (see spm_XYZreg for details)
%
% spm_transverse automatically updates its co-ordinates from the
% registry, but clicking on the slices has no effect on the registry.
% i.e., the updating is one way only.
%
% See also: spm_getSPM
%__________________________________________________________________________
%
% spm_transverse is called by the SPM results section and uses
% variables in SPM and SPM to create three transverse sections though a
% background image.  Regional foci from the selected SPM{T/F} are
% rendered on this image.
%
% Although the SPM{.} adopts the neurological convention (left = left)
% the rendered images follow the same convention as the original data.
%__________________________________________________________________________
% Copyright (C) 1994-2018 Wellcome Trust Centre for Neuroimaging

% Karl Friston & John Ashburner
% $Id: spm_transverse.m 7376 2018
    
function reposition(xyzmm)
%==========================================================================
function reposition(xyzmm)
global transv
if ~isstruct(transv), return; end;

spm('Pointer','Watch');


%-Get current location and convert to pixel co-ordinates
%--------------------------------------------------------------------------
% xyzmm  = spm_XYZreg('GetCoords',transv.hReg)
xyz    = round(transv.blob.iM(1:3,:)*[xyzmm; 1]);

% extract data from SPM [at one plane separation]
% and get background slices
%--------------------------------------------------------------------------
dim    = ceil(transv.blob.dim(1:3)'.*transv.blob.vox);
A      = transv.blob.iM*transv.V.mat;
hld    = 0;

zoomM  = inv(spm_matrix([0 0 -1  0 0 0  transv.blob.vox([1 2]) 1]));
zoomM1 =     spm_matrix([0 0  0  0 0 0  transv.blob.vox([1 2]) 1]);

Q      = find(abs(transv.blob.xyz(3,:) - xyz(3)) < 0.5);
T2     = full(sparse(transv.blob.xyz(1,Q),transv.blob.xyz(2,Q),transv.blob.t(Q),transv.blob.dim(1),transv.blob.dim(2)));
T2     = spm_slice_vol(T2,zoomM,dim([1 2]),[hld NaN]);
Q      = find(T2==0) ; T2(Q) = NaN;
D      = zoomM1*[1 0 0 0;0 1 0 0;0 0 1 -xyz(3);0 0 0 1]*A;
D2     = spm_slice_vol(transv.V,inv(D),dim([1 2]),1);
maxD   = max([max(D2(:)) eps]);
minD   = min([min(D2(:)) 0]);

if transv.blob.dim(3) > 1

    Q      = find(abs(transv.blob.xyz(3,:) - xyz(3)+1) < 0.5);
    T1     = full(sparse(transv.blob.xyz(1,Q),...
            transv.blob.xyz(2,Q),transv.blob.t(Q),transv.blob.dim(1),transv.blob.dim(2)));
    T1     = spm_slice_vol(T1,zoomM,dim([1 2]),[hld NaN]);
    Q      = find(T1==0) ; T1(Q) = NaN;
    D      = zoomM1*[1 0 0 0;0 1 0 0;0 0 1 -xyz(3)+1;0 0 0 1]*A;
    D1     = spm_slice_vol(transv.V,inv(D),dim([1 2]),1);
    maxD   = max([maxD ; D1(:)]);
    minD   = min([minD ; D1(:)]);

    Q      = find(abs(transv.blob.xyz(3,:) - xyz(3)-1) < 0.5);
    T3     = full(sparse(transv.blob.xyz(1,Q),...
            transv.blob.xyz(2,Q),transv.blob.t(Q),transv.blob.dim(1),transv.blob.dim(2)));
    T3     = spm_slice_vol(T3,zoomM,dim([1 2]),[hld NaN]);
    Q      = find(T3==0) ; T3(Q) = NaN;
    D      = zoomM1*[1 0 0 0;0 1 0 0;0 0 1 -xyz(3)-1;0 0 0 1]*A;
    D3     = spm_slice_vol(transv.V,inv(D),dim([1 2]),1);
    maxD   = max([maxD ; D3(:)]);
    minD   = min([minD ; D3(:)]);
end