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How do I remove the bottom line of the axes in a saved figure?

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I drew a graph and deleted axes by using the code below.
% code
hAxes = gca;
hAxes.XRuler.Axle.LineStyle = 'none';
axis off
However, when I added lines by using 'line' commend to explain each components, the axis at the bottom appeared again as shown below.
% code
x=[-19,-14];
y=[0,0];
line(x,y,'color','k');
x=[-19,-14];
y=[0.6,0.6];
line(x,y,'color','k');
x=[-16.5,-16.5];
y=[0,0.6];
line(x,y,'color','k');
I don't know why axis appeared again. Anyway, I drew white lines to hide black axis as shown below.
% code
x=[0,-14];
y=[0,0];
line(x,y,'color','white','linewidth',2);
x=[100,120];
y=[0,0];
line(x,y,'color','white','linewidth',2);
OK. It looks good to me. However, when I saved the graph as a pdf image, the axes appeared again!
% code
set(gcf,'Units','Inches');
pos = get(gcf,'Position');
set(gcf,'PaperPositionMode','Auto','PaperUnits','Inches','PaperSize',[pos(3), pos(4)]);
print(gcf,[fig_file,'powerexp'],'-dpdf','-r300');
Please somebody save me~!!!!
T-T
  2 Comments
Gianluca Di Muro
Gianluca Di Muro on 3 Aug 2018
and
hold on
Whatever the method you use, if you do not hold the axis, it will be rendered again with default settings, as soon as you add new children to it.

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Accepted Answer

Abby Skofield
Abby Skofield on 16 Oct 2018
Edited: MathWorks Support Team on 28 Nov 2018
If you do not want the axes outline to appear, you can turn it off using this command:
axis off
If you have an area, bar, or stem plot that has a baseline and want to turn off the baseline, set the Visible property of the Baseline object to 'off', for example:
a = area(magic(5));
a(1).BaseLine.Visible = 'off';
If those approaches do not resolve the problem, you can try preserving the plot colors when printing or saving by setting the InvertHardcopy property of the Figure object to 'off' before printing, for example:
set(gcf,'InvertHardCopy','off','Color','white');

More Answers (1)

Akira Agata
Akira Agata on 10 Oct 2017
By setting the 'Visible' property of the axes 'off' after plotting your graph, you can remove the axes. Following is a simple example.
% Plotting your graph, like:
plot(magic(4))
% Set the 'visible' property 'off'
ax = gca
ax.Visible = 'off'
% The axes is removed from PDF file, too.
print(gcf,'-dpdf','-r300');
  2 Comments
Cedric Wannaz
Cedric Wannaz on 11 Oct 2017
Did you try setting 'XColor' and 'YColor' to 'none'? Also, export using export_fig instead of PRINT.

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