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Numerical Recipes Home Page We are nr.com, Numerical Recipes Software. We are one of the oldest continuously operating sites on the Web, dating back to 1993 when there were only about 25,000 domains in the Internet. (Today, that number is about 200,000,000.) In partnership with Cambridge University Press, we develop the Numerical Recipes series of books on scientific computing and related software products.    Latest News! You can call Numerical Recipes routines (along with any other C++ code) from Python. A tutorial with examples is here. A free interface file is here. This is an alpha pre-release, so please give feedback on the forum. You can put live links to specific pages of the Numerical Recipes book into your web pages, or relevant Wikipedia articles, or anywhere else that has URL hyperlinks. Read the fine print... Our latest downloadable code product is for users, scholars, or just fans, of legacy computer languages. The NR all-languages download includes the latest C++ version; 2nd edition versions in C, Fortran 77 and 90; 1st edition versions in Pascal, Basic, Modula 2, and Lisp; plus bonus historical Numal code in Algol 60. New options for accessing Numerical Recipes Electronic, the on-line version of the 2007 Third Edition in C++, now include the Empanel™ and Rollover™ browser interfaces. These are compatable with any O/S and browser, and don't require Adobe Reader or any plug-in. Guests may view 30 pages per month free, no registration required. Subscribers, of course, have no limits. Our older editions in C (1992) and Fortran (1992, 1996), long out of print, are also now available, free, on-line in the Empanel format. As additional Empanel demos, we are also hosting some old classics, including Abramowitz and Stegun, the Problem Book in Relativity and Gravitation, and the Encyclopedia Britannica Eleventh Edition (1911). Hosted by ICTP, a UNESCO and IAEA organization, Numerical Recipes Third Edition (on-line book and code) is available by open access to users in developing countries (list). This free resource can be accessed here as PDF files (Adobe Reader and FileOpen plug-in required), or else here in the Empanel format (no plug-in needed). You can use Numerical Recipes to extend MATLAB®, sometimes giving huge speed increases. A tutorial with examples is here. A free interface file is here. Individual subscribers to Numerical Recipes Electronic who also own the book, can now convert their subscriptions to "lifetime" subscriptions. (More info here, or go here to subscribe right now.) NR readers may enjoy the Opinionated Lessons in Statistics, webcasts by NR author William H. Press. (If nothing happens when you click the images on the left, check that JavaScript is enabled in your browser.) Numerical Recipes: The Art of Scientific Computing Third Edition (2007), 1256 pp. Cambridge University Press ISBN-10: 0521880688 Learn more about the book. Buy the book now from Amazon.com. Or, buy the book and code CDROM bundle. Or, find the book in stock at most college and technical bookstores, as well as larger general bookstores. Numerical Recipes Electronic Just published, Numerical Recipes Electronic puts the full content of the Numerical Recipes book onto your computer screen, along with with many extras. Frequently updated, Numerical Recipes Electronic is available by subscription (3 year term, convertible to "lifetime"). Go to Numerical Recipes Electronic now. (Guests may access a limited number of pages per month; subscribers have full access.) Purchase an immediate subscription at the Numerical Recipes On-Line Store. Go to all of our ebooks. Free on-line versions of our older editions, plus Abramowitz and Stegun, EB Eleventh Edition, and more. Learn more about Numerical Recipes Electronic. Learn about institutional subscriptions, which include both Numerical Recipes Electronic and Numerical Recipes Code Use coupon in the book to convert an electronic subscription to "lifetime". Numerical Recipes Code Numerical Recipes Code is the C++ computer code from the Numerical Recipes book in machine readable form (or legacy code in other computer languages from earlier editions). It is ready to be included in a user's own programs. The code, including a license for such use, is sold separately from Numerical Recipes (the book) or Numerical Recipes Electronic (the book on-line). Buy the code as an immediate electronic download (3rd ed. C++, legacy 2nd ed. C or Fortran, or other languages from earlier editions). Learn more about Numerical Recipes Code. See complete license terms. Buy the code on CDROM from Amazon.com. The CDROM includes 3rd edition C++ and all legacy 1st and 2nd edition code in C++, C, Fortran 77, Fortran 90, Pascal, BASIC, Modula 2, LISP, and more. Or, buy the book and code CDROM bundle. Learn about institutional subscriptions, which include both Numerical Recipes Electronic and Numerical Recipes Code See all code changes from version 3.00/3.01 to 3.02 or from 3.02 to 3.04 (current version). Numerical Recipes Forum The Numerical Recipes Forum is where readers can ask questions, or reply to postings submitted by other readers. This free resource is also where official bug reports are posted. Go to the forum. Further Information How to contact us. General information about licenses. Single user and institutional subscriber license terms. Institutional subscriptions (site license) information. Open Access for users in developing countries. Converting electronic subscriptions to "lifetime". Obtaining permission for commercial use. Download nr3.h header file (necessary for using NR3 C++ code) Tutorial on extending MATLAB with Numerical Recipes Download nr3matlab.h header file (for interfacing to MATLAB) Older Books On-Line (NR and others we host) Other stuff. Obsolete Versions of Numerical Recipes There are many legacy applications that use obsolete Second Edition, or even First Edition, Numerical Recipes code. Also, computer languages such as C, Fortran, Pascal, Modula 2, BASIC, and Lisp were available only in previous editions. Though out of print, many of these products are still available for users with a special need for them. Learn more about previous versions. Free on-line versions with Empanel™ interface: Numerical Recipes in C (1992) Numerical Recipes in Fortran 77 and Fortran 90 (1992, 1996) Other on-line books we host Buy new or used copies from Amazon.com: Numerical Recipes in C (1992) Numerical Recipes in Fortran 77 (1992) Numerical Recipes in Fortran 90 (1996) All code from previous versions in all computer languages is included, along with the new 3rd edition C++ code, in the NR All-Languages Download, and on the Numerical Recipes Code CDROM: Buy the immediate download. Buy the code CDROM from Amazon.com. NR Recommended Reading Lists Browse our personally recommended titles in the Numerical Recipes Bookstore, hosted by Amazon.com: The new Third Edition products Numerical Recipes 2nd ed. items still in print Numerical Recipes 1st ed. items still in print C++ programming Numerical analysis Scientific computing Computer science Quantitative finance Math and statistics Miscellaneous fun Popular science