stacking eight images into two images in an array.

I have six images of two kind. One group of image is HV1,HV2,HV3 and the second group is HH1,HH2,HH3. I want to put them in an array and display them as two images HV for(HV1,HV2,HV3) and HH for(HH1,HH2,HH3). I used this code to stack them, but when I try to display them as two images, all six images appear. And an error massage in Ch appear. What am I doing wrong here.?

my_cell{1} = HV1;
my_cell{2} = HV2;
my_cell{3} = HV3;

my_cell{4} = HH1;
my_cell{5} = HH2;
my_cell{6} = HH3;

I={HV1,HV2,HV3,HH1,HH2,HH3};
save('I','I');

load('DEM')
load('DEM_avg')
load('kz')
load('I')
    Master = 1;
    [Nr,Na,N] = size(I{1});
    N_pol = length(I);
    rem_dem_flag = 1;
    if rem_dem_flag % remove dem phases (optional)
        for pol = 1:N_pol
            for n = 1:N
                dem_phase = kz(:,:,n).*(DEM - DEM_avg);
                I{pol}(:,:,n) = I{pol}(:,:,n).*exp(1i*dem_phase);
            end
        end
    end
    Ch = {'HV','HH'};

az_ax=[50 500];
rg_ax=[100 600];
 N_pol = length(I);
for pol = 1:N_pol
    figure, imagesc(az_ax,rg_ax,sum(abs(I{pol}),2)), colorbar
    title(Ch{pol})
    xlabel('azimuth [m]')
    ylabel('range [m]')
end

Answer 1

[Image Analyst]

You can display HV1 as red, HV2 as green and HV3 as blue if you do this:

HV = cat(3, HV1,HV2,HV3);
imshow(HV); % Assumes uint8 or values in the range 0-1.

For the other one with 4 planes, you'll have to figure out how to display them. If you want a 3 plane RGB image, see this paper: http://my.ece.msstate.edu/faculty/du/JSTARS-VIS.pdf