Fortran曲线拟合库
例如，在 MATLAB 中，我可能会使用 lsqnonlin 来实现 Levenberg-Marquardt 算法。
我发现 this 参考文献似乎是有用的起点，但是是否还有一种系统的方法找到 Fortran 的相关库吗？我知道 IMSL 是一个众所周知的库，但是 Fortran 库的总体主体是否不像 Python 或 R 那样免费？
For instance, in MATLAB I might use lsqnonlin which implements the Levenberg-Marquardt algorithm.
I found this reference which seems to be useful place to start, but is there also a systematic way to find relevant libraries for Fortran? I know IMSL is a well-known one, but is the general body of Fortran libraries not free as they are for Python or R?
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您找到的可能是最好的列表，并且在列出许可证方面很不寻常。还有许多很难找到的专门程序/库。许多库是在人们对许可敏感之前编写的，并且许可条款不像今天那样明确规定。许多都是政府赞助的，使它们成为公共领域，尽管没有明确说明。如果您正在制作商业产品，则需要考虑法律问题。我经常检查 http://people.sc.fsu.edu/~ jburkardt/f_src/slatec/slatec.html（在您找到的列表中），因为例程已升级到 Fortran 90。我还通过 ISO C 使用 GNU 科学库绑定。该库非常全面并获得 GPL 许可。用于此目的的 Fortran 接口库可在 http://www.lrz 上找到。 de/services/software/mathematik/gsl/fortran/。
What you found is probably the best list and is unusual in listing the licenses. There are also many specialized programs/libraries out there that can be difficult to find. Many of the libraries were written before people were sensitive to licensing and the licensing terms aren't as clearly stated as today. Many were government sponsored, making them public domain, though this isn't clearly stated. If you are making a commercial product the legal issues need to be considered. I frequently check http://people.sc.fsu.edu/~jburkardt/f_src/slatec/slatec.html (on the list you found) because the routines have been brought up to Fortran 90. I also use the GNU Scientific Library via the ISO C Binding. This library is comprehensive and GPL licensed. A Fortran interface library for that purpose is available at http://www.lrz.de/services/software/mathematik/gsl/fortran/.