How to add top and bottom x-axes labels to a heatmap?

I have a heatmap to which I want to add two x-axes, top and bottom, representing two different quantities. Attached are the .fig I got, and the source .mat.

Answer 1

[Guilherme]

Hi @ct8! I think you may want to have a look on this page: https://www.mathworks.com/help/matlab/creating_plots/graph-with-multiple-x-axes-and-y-axes.html#mw_ca4bd216-f46d-49cd-94ed-3fe176088b04

It shows how to add two axes to a single plot. Then, you'd need to use xlabel and reference the Xaxis that you want to change as the target. You'd need something like that:

t = tiledlayout(1,1);
target_bottom = axes(t);

%% 
% Plot Bottom
%%
target_top = axes(t);
target_top.XAxisLocation = 'top';
%%
% Plot Top
%%

xlabel(target_bottom,'Bottom Axis')
xlabel(target_top,'Top Axis')

[ct8]

I have tried this, but it is not working for my heat map. Essentially I want to know how to define the titled layout in my code which generates a heatmap.

figure()
imagesc(x,z,y')
% reproduce heatmap's colormap
n=256;
cmap = [linspace(.9,0,n)', linspace(.9447,.447,n)', linspace(.9741,.741,n)'];
colormap(cmap); 
axis xy
colorbar()