similar to: off-topic: better OS for statistical computing

Currently, I am working on a data mining project and plan to divide the data table into 2 parts, one for modeling and the other for validation to compare several models. But I am not sure about the percentage of data I should use to build the model and the one I should keep to validate the model. Is there any literature reference about this topic? Thank you so much!

Latex and R are really cool stuff. I am just wondering how they are used in industry. But based on my own experience, very rare. Why? How about the opinion of other listers? Thanks.

I remember in one slide of Prof. Ripley's presentation overhead, he said the most popular data analysis software is excel. So is there any resource or tutorial on this topic? Thank you so much!

Right now, I am using SAS and S+/R. As a new year resolution, I am planning to learn a scripting language. from statisticians' point of view, which scripting language is worth to learn, perl, python, or any other recommendation? (Most likely, I will be learning it in windows.) Since I am not in research, I will prefer one widely used in industry and related to statistical work. if you

Dear List, on www.r-project.org, the title says 'The R Project for Statistical Computing'. but what exactly is the definition of statistical computing?

I am sorry for this off-topic question. Just curious how xlispstat is used in the industry and what's it strengthen compared with other computing languages such as R or matlab? Thanks a lot. [[alternative HTML version deleted]]

I really have headache when I do google search for information about "R". Any tricks or tips? thx.

Good morning, dear listers I am wondering if you could recommend a good tutorial / book for r scripting. thank you so much in advance! WenSui Liu Credit Risk Manager, 53 Bancorp wensui.liu at 53.com 513-295-4370

Dear Lister, plot() is using the data range as the default limits of yaxis. Is there any way I can change the limits? I just look at the help of plot() and par() and couldn't find answers. Thanks. -- WenSui Liu (http://spaces.msn.com/statcompute/blog) Senior Decision Support Analyst Health Policy and Clinical Effectiveness Cincinnati Children Hospital Medical Center

I checked GlmmML package. However, it can only do binomial and poisson distribution. How about others such as gamma or neg binomial? Thank you so much! wensui

Sometimes, it is too costly to read the whole data file into R. I am looking for solution in scan() and read.Lines() but don't they work. Thank you so much! -- ============================== WenSui Liu Acquisition Risk, Chase Blog : statcompute.spaces.live.com Tough Times Never Last. But Tough People Do. - Robert Schuller

This is a very fascinating discussion topic. I find I run into some fundamental differences in interpretation of the phrase "statistical computing". I think of it as writing programs or functions, such as R or packages in R, and of understanding the numerical analysis behind these functions. I exclude USING computer programs, such as R, for data analysis from my definition of

Dear Listers, Is there any good paper about how to use R together with VB? Thank you so much! -- WenSui Liu (http://statcompute.blogspot.com) Senior Decision Support Analyst Cincinnati Children Hospital Medical Center [[alternative HTML version deleted]]

i am just wondering if there is an effective way to include other external codes into the program. thanks. [[alternative HTML version deleted]]

Dear Listers, I've been a big fan of R since graduate school. After working in the industry for years, I haven't had many opportunities to use R and am mainly using SAS. However, I am still forcing myself really hard to stay close to R by reading R-help and books and writing R code by myself for fun. But by and by, I start realizing I have hard time to keep up with R and am afraid that I

Hi R-experts, I have data from four conditions of an experiment. I tried to create four subsets of the data with read.table, for example, read.table("Experiment.csv",subset=(condition=="1")) . I found a similar post in the archive, but the answer to that post was no. Any new ideas about reading subsets of data with read.table? Thanks! Feng [[alternative HTML version

Dear Lister, If I have a list of number, say x<-c(0.1, 0.5, 0.6...), how to use a for() to loop through each number in x one by one? Thank you so much! wensui [[alternative HTML version deleted]]

Dear All, Monthly and Quarterly ts obj. is easy to understand. But I couldn't find an example in R manual how to create daily or weekly ts object. Could you please shed some light on it? I really appreciate it.

Dear All, I finally have chance to have R install on our unix server. However, the system admin asked me if I prefer command-line or gui interface. I have experience with R on linux before but never use R on unix. Here are my questions that I need you guys help. 1) is there a good gui for R/unix like we do for windows and mac? 2) if the answer for 1) is yes, which one is better interms of

I like R more than SAS. My job is doing research on clinical trial. But I was told that FDA only accepts the result from SAS. Is that true? TOO BAD. [[alternate HTML version deleted]]