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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! Big news: Numerical Recipes Electronic, the on-line version of the 2007 Third Edition in C++, can now be read with two new interfaces, codenamed Empanel™ and Rollover™. Both are compatable with any O/S and browser, and they don't need the FileOpen plug-in. Also new: 30 pages per month are free to Guests, no registration required. Subscribers, of course, have no limits. Our obsolete editions in C (1992) and in Fortran (1992, 1996), long out of print, are now available on-line in the Empanel™ format, free, no plug-in and no registration required. The Numerical Recipes download store now accepts PayPal payments in addition to most major credit cards. Numerical Recipes Third Edition (on-line book and code) is available by open access to users in developing countries. This free resource is hosted by ICTP, a UNESCO and IAEA organization. For now, the FileOpen plug-in is still 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.) Amazon.com has the Numerical Recipes Third Edition book in stock. (See it here.) (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"). Subscribe now at the Numerical Recipes On-Line Store. Learn more about Numerical Recipes Electronic. Go to Numerical Recipes Electronic now. (Guests may browse free sections; subscribers have full access.) 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, 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). Learn more about Numerical Recipes Code. See complete license terms. Buy the code as an immediate electronic download (3rd ed. C++, or legacy 2nd ed. C or Fortran). 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 versions 3.00 and 3.01 to current version 3.02. 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) Free on-line versions using the older FileOpen plug-in (also, other 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 Numerical Recipes Code CDROM: Buy the code CDROM from Amazon.com. Second edition C and C++ code is included, along with the new 3rd edition C++ code, in the Numerical Recipes Code download product: Buy the code as an immediate electronic download. 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