I think you mean this
n = 10; % 10 subplot but only 4 of them are used ?
subplot(1,n,1);
plot(x,y,'.-');
subplot(1,n,2);
semilogx(x,y);
subplot(1,n,3);
semilogy(x,y);
subplot(1,n,4);
loglog(x,y);
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