Linux统计软件

March 24, 2009 by leon · Leave a Comment 

统计实验设计说到底是挺有趣的课.

研究一下

GNU PSPP

PSPP is a program for statistical analysis of sampled data. It is a Free replacement for the proprietary program SPSS, and appears very similar to it with a few exceptions.

A brief list of some of the features of PSPP follows:

  • Supports over 1 billion cases.
  • Supports over 1 billion variables.
  • Syntax and data files are compatible with SPSS.
  • Choice of terminal or graphical user interface.
  • Choice of text, postscript or html output formats.
  • Inter-operates with Gnumeric, OpenOffice.Org and other free software.
  • Easy data import from spreadsheets, text files and database sources.
  • Fast statistical procedures, even on very large data sets.
  • No license fees.
  • No expiration period.
  • No unethical “end user license agreements”.
  • Fully indexed user manual.
  • Free Software; licensed under GPLv3 or later.
  • Cross platform; Runs on many different computers and many different operating systems.

The R Project

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.

R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, …) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity.

One of R’s strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.

R is available as Free Software under the terms of the Free Software Foundation’s GNU General Public License in source code form. It compiles and runs on a wide variety of UNIX platforms and similar systems (including FreeBSD and Linux), Windows and MacOS.

Feeds, Plugins, SNS and More

September 28, 2008 by leon · 2 Comments 

用这个地址订阅FEED :http://feed.feedsky.com/LeonsDay
还是觉得feedsky就够用了,而且服务器在中国,不会出太大的岔子。

在边上加了一个叫Wall的插件,就是个简易的留言版。实际上没有太大的意思。其实现在twitter和饭否说是微博克,也就是功能强大的留言板而已,可以用api放到任何地方,还能同步到手机短信里……每时每刻都能保证分散注意力,美国人的发明现在越来越有这个趋势了……原来是想加一个twitter或者饭否在边上,可是这样一来,似乎又参和了更多的服务,看的人要反馈还要去注册帐号,实在太麻烦。

本来建立blog的目的就是想从xiaonei或者facebook这种SNS里独立出来。
上次看到douban改版的时候,发觉豆瓣基本上什么服务都有了,相册,日志,广播(就是微博客吧),群组化,如果在发展下去,准能整出个IM来。其实很怀念豆瓣只有书评影评乐评的时代。当时我的感觉是,喜欢折腾的人都在豆瓣小组里混着,书评相对被独立在一个和豆瓣小组无关的“纯净”的地方。不过也不能说现在的豆瓣就不如最初的状态,为什么不能在一个地方拥有好用的博克系统,微博客系统,相册还有社交服务……好吧,我只是个人有点不喜欢。

但我希望可以用到豆瓣的核心功能,我喜欢的部分,还有xiaonei,facebook,这种感觉可以描述为,我希望用到SNS这个大章鱼的八条爪子,却不喜欢身为一条章鱼的感觉,呵呵。于是我希望我可以学会怎么来用他们的API。

哎……

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