a=[20 30 50 80];
b=[1,2];
c=[1,2];
ind=fullfact([length(a) length(b) length(c) ]);
out(:,1)=a(ind(:,1));
f=find(ind(:,2)==1);
out(f,2)=sind(out(f,1));
f=find(ind(:,2)==2);
out(f,2)=-sind(out(f,1));
f=find(ind(:,3)==1);
out(f,3)=tand(out(f,1));
f=find(ind(:,3)==2);
out(f,3)=-tand(out(f,1));
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