See if the xticks call in:
xticks([a+g:dxf:b-g (b-g+dxs):dxs:b])
does what you want —
a=0;
b=4;
c=0;
d=6;
g=1;
dxs=0.2;
dxf=0.25;
dy=0.5;
figure(1)
plot([a b b a a],[c c d d c])
hold on
axis([a-1 b+1 c-1 d+1])
hold on
plot([a+g b-g b-g a+g a+g],[c c d d c])
hold on
axis([a+g-1 b-g+1 c-1 d+1])
grid on
axis tight
axis equal
xticks([a:dxs:a+g (a+g)+dxf:dxf:b-g (b-g)+dxs:dxs:b]) % NEW
Check = xticks % Check Values (Optional)
% xticks([a:dxs:a+g])
yticks([c:dy:d])
The xticks argument values have to increase, so two adjacent values of (b-g) are not permitted.
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