Manually Create a montage of images collected in a zig zag pattern

Hello, I have a set of 40 (100x100 pixels) images that I have in an 1D cell array ROIC_Array (size(ROIC_Array) = 1 x 40)

I collected them by scanning in a zig zag motion i.e. the 1st 10 images are left to right (x direction), then the next 10 images are right to left and stepped (in y). I want to create a montage of them stiched together. I know imTile exists, but it lloses resolution so I want to create the montage manually. Even before I get into reversing every other row, I can't get the basic montage working

             % Create Montage             
             Montage=reshape(ROIC_Array,4,10);    % want 4 rows, 10 columns
             IM2=[]; IMrow=[];
              % Vertcat rows
              for i=1:4
                     IMrow=Montage(i,:)
                     IM2=vertcat(IM2,IMrow);
              end
             size(IM2)
             figure
             ax=subplot(1,1,1);
             myImagesc(ax,IM2)   %   My version of Imagesc that uses Gray Colourmap and removes all ticks

Answer 1

[Jason]

Seems I didn't need the reshape. This works, not sure its the most elegant way

             %Now create Montage
   
              IMrow=[];
              IMout=[];
              ct=0;              
              for j=1:4     %rows
                   for i=1:10    % cols
                     ct=ct+1                    
                     IM=ROIC_Array{ct}
                     IMrow=horzcat(IMrow,IM);                    
                   end 
                   if rem(j,2)==1  %If ODD
                          % Do nothing  
                   else
                           IMrow=fliplr(IMrow);
                   end 
                   IMout=vertcat(IMout,IMrow);
                   IMrow=[];
              end

             figure
             ax=subplot(1,1,1);
             myImagesc(app,ax,IMout);