求教大家关于R软件的

阿尔瓦雷斯

R软件很难学吗 本人没编程背景 刚接了一个project 要学R统计软件 大家有什么自学窍门吗

MacFin

http://www.perossi.org/home/class-materials-1/b269/materials-for-b269-1/SomeUsefulRPointers.pdf?attredirects=0&d=1

lijiesjtu

我觉得关键是掌握那些统计过程，编程的话，照猫画虎改一下就好了。

lewnysh

是我自己

lewnysh

刚用R完成了小硕论文答辩的路过

反正我是很喜欢开源的东西啦
至于难学什么的 程序类都差不多吧 看几天就有基础了  反正够用就行 偶也不是很精通
难的还是数学理论本身... 不弄清这个本质上被束缚

基础书的话我没看过太多 我就看过两本 推荐下
高惠璇 应用多元统计分析 北京大学版社 2005
王斌会 多元统计分析及R语言建模 暨南大学出版社 2011
还有就是海外的开源社区神马的

还是等别的专家给你更好的建议吧
反正我觉得学一周就够了
如果没有数学基础 。。。 这个。。。 照猫画虎一周也够了
深入的话 还是需要时间

aeoluseros

国内都基本上没怎么见过有人用R。。。谢谢~

阿尔瓦雷斯

我觉得R首先搞清楚data type很重要，有的function只接受一种data type，详见这里：
http://www.statmethods.net/input/datatypes.html
特别是data frame，我一开始就老因为这个出错不断。

-- by 会员 BeBrave2011 (2012/5/12 11:00:41)

太感谢你了 好人！！！！！！！ 我这几天晚上研究下你给的链接

BeBrave2011

我觉得R首先搞清楚data type很重要，有的function只接受一种data type，详见这里：
http://www.statmethods.net/input/datatypes.html
特别是data frame，我一开始就老因为这个出错不断。

BeBrave2011

I am attaching 3 files here:  the input CSV file which we discussed today, the R code, and the PPT containing the variable distributions in the original population.  It would be great if the script could be set up such that the user inputs the following:



(1)    Range of acceptable values for each variable in each level (in our example, there are 8 levels)

(2)    # of samples we want to select from each level (in this case, 13)

(3)    The CSV file
这部分可见：http://www.statmethods.net/input/importingdata.html



And the script will produce as outputs:

(1)    The seed that produced the final set of 13 samples for each level

(2)    The list of selected sample IDs (in this case, 13) for each level.  In this case, the sample IDs are the ‘Sitesubj’ variable in the CSV file.

(3)    lots and tables showing the final variable values (all scaled in %) for each level
这部分可见：http://www.statmethods.net/management/index.html
http://www.statmethods.net/graphs/index.html



Something else I forgot to mention, which might be of help is that you can set the y-axis range for the boxplots using the command:  

boxplot(s1$AGE, ylim=c(10,77))



This helps when comparing the original boxplot to the sample boxplot, since you can set their y-axes to be the same.



Also, you had asked about the continuous variables (what to use for range).  I should have asked if you were familiar with boxplots, but here is a brief reference:



http://www.childrensmercy.org/stats/definitions/boxplot.htm



There are 5 numbers that comprise a boxplot—so you could pick some of them to use for setting your ranges.  I would suggest trying the median, mean, and box length, since these are the most important components

-- by 会员 阿尔瓦雷斯 (2012/5/12 6:29:00)

piner

thanks for sharing

BeBrave2011

我以前学R的时候很喜欢的网站：
http://www.statmethods.net/
我觉得这个比R的官方网站清楚，上手快。