
50 Optimization: Algorithms and Applications
be used for all types of problems. Different methods may have to be tried for
different problems.
Let us evaluate the efciency of each of the methods for the test case problem
that we discussed in an earlier section. One way of dening efciency of an
optimization method could be to show how x approaches x* with increasing
iterations. Because the number of function evaluations in each iteration is dif-
ferent for different methods, we can plot |x − x*| versus number of function
evaluations for a meaningful comparison. Figure 2.11 shows this plot for differ-
ent solution methods for the solar energy te ...