Ticks missing in contourf

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I want to plot ticks at logarithmic values (without labels, only the ticks). For some reason the following code doesn't plot them (set(gca,'XTick') doesn't do anything):

figure1=figure(1)
axes1 = axes('Parent',figure1,'YScale','log','XScale','log');
grid(axes1,'on');
hold(axes1,'on');
[C,h]=contourf(lamx(2:NKX+1),lamz(2:NKZ+1),phi2d(2:NKX+1,2:NKZ+1)',[10],'LineColor','none');
clabel(C,h);
axis tight;    
axis([lamx(end) max(lamx) lamz(end) max(lamz)]) 
xlabel('\lambda_x','Fontsize',20);
ylab=ylabel('\lambda_z','Fontsize',20);
set(gca,'XTick',0.1:0.1:1)
grid on
set(gcf, 'PaperPositionMode','auto'); 
set(ylab, 'Units', 'Normalized', 'Position', [-0.1, 0.5, 0]);
set(gca,'linewidth',1.5,'FontSize',16)
colormap(flipud(gray(256)));
colorbar;  
print('-dpng','-opengl','-r1200','2dspec')

enter image description here

How could the ticks be plotted?

matlab-figure matlab
1 Answers

The ticks in your example are obscured by the Contour object itself. The order in which the Axes elements are drawn relative to objects within it is controlled with the Axes Layer property.

The default value for this property is bottom which means anything like a filled contour drawn in the axes will be drawn on top of the ticks, and you won't be able to see them. The contourf function obviously knows this isn't a helpful default for plots that will obscure the ticks in their entirety because it usually changes the property to top when you call it – but only when the Axes NextPlot is set to replace. By calling hold on you also cause contourf to leave that property alone, so it ends up staying at bottom.

In your example you can deal with this in one of two ways.

  1. As it's currently written, there no intentional effect of the hold(axes1,'on'); line, because you're only adding one plot. So you could just remove that line if your full code doesn't rely on it. Otherwise,

  2. Set the Layer property to top from the outset when you create the axes:

    axes1 = axes('Parent',figure1,'YScale','log','XScale','log','Layer','top');
user_13066470
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