filename = 'BedMachineGreenland-2017-09-20.nc’; 
x = ncread(filename,'x'); 
y = ncread(filename,'y'); 
bed = ncread(filename,'bed')'; %Do not forget to transpose (MATLAB is column oriented) 
%Display bed elevation 
imagesc(x,y,bed); axis xy equal; caxis([-500 1800]);