Читать книгу Applied Numerical Methods Using MATLAB - Won Y. Yang - Страница 34

Among the various criteria about the quality of a general program, the most important one is how robust its performance is against the change of the problem properties and the initial values. A good program guides the program users who do not know much about the program and at least give them a warning message without runtime error for their minor mistake. There are many other features that need to be considered, such as user friendliness, compactness and elegance, readability. But, as far as the numerical methods are concerned, the accuracy of solution, execution speed (time efficiency), and memory utilization (space efficiency) are of utmost concern. Since some tips to achieve the accuracy or at least to avoid large errors (including overflow/underflow) are given in the last section, we will look over the issues of execution speed and memory utilization.