similar to: SAS Proc summary/means as a R function

>>> What were your biggest misconceptions or >>> stumbling blocks to getting up and running >>> with R? Easy. I terms of materials I have been unable to find good books that introduce users to R from the perspective of someone familiar only with packages like SPSS or STATA, or not familiar with statistics packages at all. Even introduction texts use jargon

Hi, This is not meant to be critical of R, but is intended as a possible source for improvements to R. SAS needs the competition. I am reasonably knowledgeable about R SAS-(all products including IML) SAS and R run on Windows(all flavors) UNIX(all flavors) Apple OSs Does R run on natively (no emulation)? We have quite a few users on these systems VAX-VMS Z-OS (mainframe) MVS VM/CMS(IBM)

I have a simple 1 way anova coded like summary(ANOVA1way <- aov(Value ~ WellID, data = welldata)) How can I use the BY function to do this ANOVA for each group using another variable in the dataset?? I tried coding it like this, but it doesn't seem to work. summary(ANOVA1way <- by(welldata, Analyte, function(x) aov(Value ~ WellID, data = welldata))) In SAS I would code it like this:

If anyone wants to see a prime example of how inefficient it is to program in SAS, take a look at the SAS programs provided by the US Agency for Healthcare Research and Quality for risk adjusting and reporting for hospital outcomes at http://www.qualityindicators.ahrq.gov/software.htm . The PSSASP3.SAS program is a prime example. Look at how you do a vector product in the SAS macro

Dear R users, I'm hoping to get a few suggestions about which books are good to follow along and learn R. I'm hoping to spend the summer going through a good R book as it is applied in linear regression. Thanks!

I am an intern in Virginia Beach and I am currently working on a project that involves converting a script of Pearl to R. The code takes one input text file and outputs six text files. If you think you can help, I will be able to provide more detailed information. Thank you for your time! Colton Hunt

Greetings, I love the R system and am sincerely grateful for the great effort the product and contributors are delivering. My question is as follows: I am trying to use S4 style classes but cannot write functions that modify an object because paramter passing is by value. For example I want to do this: setGeneric("setData", function(this,fcn,k){ standardGeneric("setData")

Hello everyone. It is time to start writing more and more function and I want to read in a good reference -book ( I can buy one, especially if it is second handed :P) -online tutorial -any other guide -How functions really work in R -How to write bigger R programs -If there are local function variables. -Global ones and how to treat them -How to include function files in order to keep your all

Hi all, I am hoping that someone can help me with a problem I am having with column headings. I have read a table into R using read.table: the rows are documents, and the columns are counts of regular expression matches (so that the column heading is the given regular expression). My problem is that read.table seems to be trying to interpret the regular expressions, or has trouble with the

Hi all, Is there any way to add notes or comments to R objects? It can be hard for me to come up with a descriptive name that encapsulates all the differences between data sets, so it would be very helpful if I could add a note which described the object. I didn't find anything like this in the R docs. Regards, Matt [[alternative HTML version deleted]]

Hello, I am currently attempting to introduce R at my company and am trying to import time series data from a text file into R to graph. The format of the text file is in date, data (e.g., 20040929 3.361). My problem is that I do not know how to get R to recognize the first column as a business date series. Or at the very least, I am unable to find a function that will grap the second column