<p> The following topics are selected from "Chapter 22" of <a href="http://www.insightful.com/" target="_blank">S-Plus</a> 2000 Programmer's Guide (or my mirror <a href="./reference/pguide.pdf" target="_blank">here</a>). Some of them are very useful to improve your code to make it short and more efficient. <hr> <font color="red"> <ul> <li> Use Vectorized Arithmetic <li> Avoid for Loops <li> Avoid Growing Data Sets <li> Avoid Looping Over Named Objects <li> Keep It Simple! <li> Reuse Computations <li> Reuse Code <li> Avoid Recursion </ul> </font> --- <div w3-include-html="../preamble_tail_date.html"></div>