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I think the easist way is to use awk. you can even do it from within R by "system" (I think). With awk "BEGIN{FS=\"\t\";OFS=\"\t\"} {print \$3, \$8}" datafile > tmp_datafile you extract columns 3 and 84...

Dear help list, I have a timestamp in as a chron object: > (x <- chron(dates = c("12/02/11", "22/11/11"), + times = c("07:30:00", "04:00:00"), + format = c(dates = "d/m/y", times = "h:m:s...

Dear all, I've 2 questions concerning locfit, I didn't find in Loader: Local Regression ... 1. If I perform locfit with family = "qhuber", the residual variance estimate (rv) is based on normalized residuals. "qgauss" is on original scale. Is...

Dear R-users & developers, i'd like to know your opinion on the following suggestion. In short: Wouldn't it be possible to combine the properties of local regression (loess) and resistant regression (lqs) in order to cope with fitting...

Hello everybody! I have a problem, that might be a quite common one. Often one has some statistics on subpopulations defined by several factors. This is usualy done by tapply resulting in a list. For presentation-tasks, the form of...

Hello s/r users! I've been digging around in the s- and r-mailing lists, but i actually didn't find any answer to my question. So here it is: How can i realize the following: myexec | R r...

Hello everybody! I have 2 >issues< concerning methods applied to missing data. I think they're bugs, but who knows. 1. var(NA) returns Error in var(NA) : missing observations in cov/cor instead of NA. I expanded the summary...

Dear R-users, I'd appreciate your statistical opinion on the following problem. I'm fitting the four parameter logistic model [f(x) = a + (b - a)/(1 + exp((c - x)*d))] to assay data. We have a lot of samples...

Thanks for replies, but i was not precise enough. The problem is not evaluating statistics on data with NA values. The problem is evaluation of statistics on data with length = 0. To make the problem more clear this is what...

I always wonder why no one of the real experts posts a reference to E. Brunners work: Brunner, E., Domhof S. and Langer, F. (2002). Nonparametric Analysis of Longitudinal Data in Factorial Designs. Wiley, New York. The german book is...

My first Problem is a minor one. Maybe some knows a reson. Pleas give me a hint off-line, as it seems to be something stupid. 1. I sent my first mail to r-help at lists.R-project.org...

Thank you very much Professor Ripley! Afterwards it seems obvious where to look. Have a nice day, Maciej PS: Yes, my machine has not much memory, but it is sufficient for the smaller trial data. -----Urspr?ngliche Nachricht----- Von: Prof...

Dear all, I have some problems with importing data from an Access data base via RODBC to R. The data base contains several tables, which all are imported consecutively. One table has a column with column name "NO". If I...

Dear Professor Ripley, Thank you very much for your response. I send the problem, as I didn't have any more ideas were to search for the reason. I didn't say this is a R bug, knowing the responses...