i plotted a double axis graph, but i don't need the second plot,only the axis. can you correct it..?

x1=prof_N(:,1);
y1=prof_1(:,2);
x2=prof_1(:,1);
y2=prof_1(:,2);
hl1 = line(x1,y1,'Color','r');
ax1 = gca;
set(ax1,'XColor','r','YColor','r')
x2 = axes('Position',get(ax1,'Position'),...
         'XAxisLocation','top',...
         'YAxisLocation','right',...
         'Color','none',...
         'XColor','k','YColor','k');
hl2 = line(x2,y2,'Color','k','Parent',ax2);

i need the axis distance,depth,age and a single plot