SAS,强大,上手并不难。因为太多版权的限制包括出版物,让大众觉得高深莫测。比起R,SAS就显得太简单了。作为一个SAS,R都不太会的得用户,我这样想的 :P
Showing posts with label Statistics. Show all posts
Showing posts with label Statistics. Show all posts
Wednesday, November 22, 2006
Sunday, September 10, 2006
Designing and Analysis of Clinical Trials
Designing and Analysis of Clinical Trials是本好书。书里有很多临床试验的例子,还讲了不少FDA和ICH的要求。整个书比较实用,数据分析部分没有太多的理论和公式推导,概念讲清楚就是应用。这几天慢慢看了。
Wednesday, September 06, 2006
Distributions
Poisson distribution
`p(X)=(lambda^Xe^(-lambda))/(X!)`
The normal distribution
`Y=1/(sigma(sqrt(2pi)))e^(-(1//2)(X-mu)^2//sigma^2)`
The t distribution ("Student's t ")
`t=(bar(X)-mu)/(S//sqrt(N))`
`p(X)=(lambda^Xe^(-lambda))/(X!)`
The normal distribution
`Y=1/(sigma(sqrt(2pi)))e^(-(1//2)(X-mu)^2//sigma^2)`
The t distribution ("Student's t ")
`t=(bar(X)-mu)/(S//sqrt(N))`
Wednesday, July 19, 2006
学习SAS从 The little SAS book 开始
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