图文版 http://blog.pixnet.net/kewang/post/3148685 昨天晚上在上GA的时候，老师说上课要用Matlab，可是我是用linux，哪来的Matlab可以 用，虽然Matlab有linux版，可是听说要10张小朋友。 所以我就找了一些资料，发现在linux下有蛮多Matlab的替代软体，像是Octave, Rlab还 有R，这三套在linux上好像都蛮多人在用的。 Octave的首页就这样说了，「相容於Matlab」，所以拿来代替Matlab应该是再恰当也不过 了。 GNU Octave is a high-level language, primarily intended for numerical computations. It provides a convenient command line interface for solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with Matlab. It may also be used as a batch-oriented language. Rlab的首页则是这样子表示，「Rlab想要做的比Matlab更好」，可是原来的作者Ian Searle已经停止开发了。停止开发四年後，有另一位叫做Marijan Kostrum的人接手了 Rlab的这个计画，後来发展成Rlab plus。这感觉怎麽跟BMP和BMPx的关系好像 XDDDD Rlab is an interactive, interpreted scientific programming environment. Rlab is a very high level language intended to provide fast prototyping and program development, as well as easy data-visualization, and processing. Rlab is not a clone of languages such as those used by tools like Matlab or Matrix-X/Xmath. However, as Rlab focuses on creating a good experimental environment (or laboratory) in which to do matrix math, it can be called ``Matlab-like''; since the programming language possesses similar operators and concepts. R的首页是说，「R是一个统计计算的语言」，感觉上好像跟Matlab的用处不同，所以我也 没有继续再研究了。 R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R. 总之我现在是使用Octave了啦。要安装Octave很简单，反正就是apt-get就对了 sudo apt-get install octave2.9 不过Octave没有内附的image generator，所以我们要利用gnuplot这套软体来帮助Octave 产生图形。 sudo apt-get install gnuplot 安装好之後我们就可以开始使用Octave啦，只要在终端机输入octave就可以了 首先先输入一个简单的函式，看看能不能使用Octave+gnuplot来绘图。 x=[0 2 4 7 10 12] y=[3 4 0 6 1 3] plot(x,y) 如果有出现下面的这个图，那就大功告成啦！ 参考资料： Octave Rlab Web Site Welcome to the RLaB plus 1.0 website The R Project for Statistical Computing gnuplot homepage 几个可以处理矩阵的计算机: octave/rlab/R -- 杂七杂八的kewang部落格 http://kewang.pixnet.net --

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