How i can trace HeatMap of three vectors data using imagesc ?

hi Community ?

I am trying to trace a heatmap of three vectors data ( in my case i would like to trace the GHI=f(azimut,elevation) data in function of azimut and elevation). I have already trace the GHI=f(day,hour) using the imagesc, the below code :

 k=1;
for i=1:365; % 365 day 
    for j=1:24; % 24 hours
    data(j,i)=GHI(k);
    k=k+1 ;  
     if(k==length(GHI)-1) k=1;
    end
    end 
end
 imagesc(data), colormap(jet), colorbar;caxis([0 1100]);

the code works fine because the day and the hour data are integers and adjacent values, But when I try to trace GHI=f(azimut,elevation) the data are real and not adjacent, so i get error in for loops and if I try to use round(A) function and remove the duplicate ( unique(..) function ) values to get an adjacent data I lose a lot of my data. below you find some GHI=f(azimut,elevation) example data.

Thank you :)