How to set the same grid size of the axis for different plots?

Using imagesc function, I plotted the data for different sets of vaues. For the first plot, the x-axis limits are [-40 12] and for the second plot, the x-axis limits are [-56 8]. But I got the same size of the the plots. How to get the different size of the plots using an equal grid size for both the plots?

If I add the colorbar the size of the second image plot shrinks. How to add the colorbar without affecting the size of the image?

[KSSV]

Show us your code.

[Sateesh Kandukuri]

allTables = dir('**/table.txt');
%first loop for sorting the folders by sorting the files
for k = 1:numel(allTables)
    F1 = fullfile(allTables(k).folder, allTables(k).name);
    A1 = readmatrix(F1);
    % sort files
    I = max(A1(:,11));
    allTables(k).max= I;
end
[~,X] = sort([allTables.max]);
allTables = allTables(X);

%normal modes
Bmin= -40;
Bmax= 12;
Bstep= 4;
T=20; % Total run time in ns
basicf=10000/20;
resolf=1e-9/T;

matrixplot=zeros(20001,k);

for index = 1:numel(allTables)
    F2 = fullfile(allTables(index).folder, allTables(index).name);
    A2 = readmatrix(F2);
    M=A2(:,4);
    M=M-mean(M);
    sol=fft(M);
    sol2=fftshift(sol);
    maxpeax=max(abs(sol2));
    sol3=abs(sol2)/maxpeax;
    matrixplot(1:length(sol),index)=sol3; 
end

x=[Bmin Bmax];
y=[-basicf basicf];
imagesc(x,y,matrixplot);
xlim([Bmin Bmax]);
ylim([0 08]);
set(gca,'Ydir','normal','FontSize',16)
ylabel('f (GHz)', 'FontSize', 20, 'FontWeight', 'bold');
xlabel('B_z(mT)', 'FontSize', 20, 'FontWeight', 'bold');
txt = {'B_z , m_z'};
text(0,7,txt,'FontSize', 16, 'Color','w')

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/pbaspect.html

https://www.mathworks.com/help/matlab/ref/daspect.html

You can set the plot box aspect ratio and data aspect ratio, or use the convenience of "axis image" https://www.mathworks.com/help/matlab/ref/axis.html#d124e70500

image objects fill at least one dimension of the axes, so if you need the drawing area to have the same pixel size for multiple axes, then you might need to set the axes Units to pixels and set the Position to the desired image size in pixels (make sure that you "axis off")

You can set the colorbar Position in pixels

[Sateesh Kandukuri]

Dear Walter Roberson, thank you so much for your response. I solved my problem in another way.