function Jg = Jacg(c,t) % this function is used in a minimization problem for i = 1:length(t) Jg(i,:) = [ 1 exp(c(3)*t(i)) t(i)*c(2)*exp(c(3)*t(i)) exp(c(5)*t(i)) t(i)*c(4)*exp(c(5)*t(i))]; end end