Adding different colorbars to each row of subplots? Removing subplot axes? Decrease subplot spacing?

I am having a hardtime figuring out how to do a few things to a subplot. I will list them below:

1. COLORBAR: When I try to add colorbars to each row of subplots in a 4x5 subplot figure (see image attached), It adds all the colorbars to the lower right corner. Two things wrong with this... 1) i need one colorbar for each row corresponding to that particular color. 2) I would like the colorbar to be outside of the subplot so that each subplot is the same shape. I indicated this on the attached image with the black markings.
2. AXES: I would like to remove the y axes from each subplot except for the one on the left side (column 1). Similarly, I'd like to remove the x axis from each subplot except for the bottom (row 5).
3. SPACING: I would like to decrease the spacing in between each subplot.

I included a more simplified version of my code below. Thanks so much in advance.

count = 0;
ax = zeros(4,5);
for i = 1:length(cells)
    for k = 1:length(Sess)
            count = count+1
        ax(i,k) = subplot(4,5,count);
        imagesc(CSbyShut); hold on;
        set(gca,'XTick',0:150:600);
        xticklabels({'-5','0','10','15','20'})
        caxis([-5 15])
        set(gcf, 'Position',  [100, 100, 1500, 800])
        xline(150,'-r');xline(450,'-r');
    end
end
for t = [1,5,9,13,17]
    colormap(ax(t),Map.blackmap);colorbar;
end
for t = [2,6,10,14,18]
    colormap(ax(t),Map.bluemap);colorbar;
end
for t = [3,7,11,15,19]
    colormap(ax(t),Map.greenmap);colorbar;
end
for t = [4,8,12,16,20]
    colormap(ax(t),Map.redmap);colorbar;
end

Answer 1

[Srivardhan Gadila]

The following code might help you w.r.t the points 1. COLORBAR(Changing the Position (position: [left bottom width height]) property of the colobar) & 2. AXES (Axes Properties - Ticks)

close all
count = 0;
for i = 1:4
    for k = 1:5
            count = count+1
        ax(i,k) = subplot(4,5,count);
%         imagesc(CSbyShut); 
        hold on;
        set(gca,'XTick',0:150:600);
        xticklabels({'-5','0','10','15','20'})
        caxis([-5 15])
        set(gcf, 'Position',  [100, 100, 1500, 800])
        xline(150,'-r');xline(450,'-r');
        if i~= 4
            set(gca,'XTick',[])
        end
        if k~=1
            set(gca,'YTick',[])
        end
    end
end

colormap(ax(1,5),'parula');
pos = get(subplot(4,5,5),'Position')
h = colorbar('Position', [pos(1)+pos(3)+0.02  pos(2)  pos(3)/10  pos(4)]);

c2 = colormap(ax(2,5),'jet');
pos = get(subplot(4,5,10),'Position')
h = colorbar('Position', [pos(1)+pos(3)+0.02  pos(2)  pos(3)/10  pos(4)]);

c3 = colormap(ax(3,5),'gray');
pos = get(subplot(4,5,15),'Position')
h = colorbar('Position', [pos(1)+pos(3)+0.02  pos(2)  pos(3)/10  pos(4)]);

c4 = colormap(ax(4,5),'pink');
pos = get(subplot(4,5,20),'Position')
h = colorbar('Position', [pos(1)+pos(3)+0.02  pos(2)  pos(3)/10  pos(4)]);

Refer to colormap, subplot, Axes Properties - Ticks & How to make one Colorbar for a 2x2 subplot.

Regarding reducing the space between adjacent subplots you can make use of the resources in the following page: "tight subplot" MathWorks Help Center