function jac = meyer_jac(p, data1, data2) n=16; m=3; for i=1:n ui=0.45+0.05*i; tmp=exp(10.0*p(2)/(ui+p(3)) - 13.0); jac(i, 1:m)=[tmp, 10.0*p(1)*tmp/(ui+p(3)), -10.0*p(1)*p(2)*tmp/((ui+p(3))*(ui+p(3)))]; end