function [s1, s2, s3, s4, s5, s6, s7, s8] = set8(an)
% return 8 element vector as 8 values
s1 = an(1);
s2 = an(2);
s3 = an(3);
s4 = an(4);
s5 = an(5);
s6 = an(6);
s7 = an(7);
s8 = an(8);