similar to: Prime or dash in plotmath().

Just now I again had occasion to want nested describe lists in a documentation file. I found that the bug which I reported on 18 October, 2001 still persists. I checked on the bug report at the R web page, and found that the notes say ``Not a problem in R 1.4.0 (2001-12-08)''. Well, it's still a problem for me --- using R 1.4.1. (Details: platform sparc-sun-solaris2.7 arch

In checking over the solutions to some homework that I had assigned I observed the fact that in R (version 2.4.0) pnorm(-1.46) gives 0.07214504. The tables in the text book that I am using for the course give the probability as 0.0722. Fascinated, I scanned through 5 or 6 other text books (amongst the dozens of freebies from publishers that lurk on my shelf) and found that some agree with R

Dimitris Rizopoulos wrote: > look at ?rowMeans; you can also use "apply(mat, 1, mean)" but > rowMeans() is better. By my reading of the question, this is not what Ezhil wants. He said: ``I have a 992 x 74 matrix. I would like to form a new matrix by averaging each 4 rows from the original one.'' I.e. he wants (I think) the first row of the new matrix to be the

I mis-spoke. It seems I had two collections of functions in the same directory. One by Colin Goodall, and one by David Scott (I have no record of where he is/was located). It is the *latter* collection that does all its work from within Fortran. I'll have another look at what Colin Goodall actually wrote to see if it could be useful to guarav. cheers, Rolf Turner rolf at

I have just been bitten by a quirk in the behaviour of model.matrix. I used model.matrix inside a function, and passed to it a formula that was built elsewhere. The formula was of the form ``y ~ x + w + z''. Now, model.matrix cheerfully accepts formulae of this form, although it only ***needs*** the right hand side, i.e. ``~ x + w + z'' --- the ``y'' can be dropped (but

Is there a way of calculating the derivative of a function returned by splinefun()? Such a function is a cubic spline, whence it has a calculable derivative, but is there a (simple) way of getting at it? One workaround that I have thought of is to take a fine grid of points, evaluate the function returned by splinefun() at these points, put an interpolating spline through these points using

If one specifies new options in a package, using the options() function, where does/should one document these new options? E.g. suppose that I put the line options(melvin=42) in a file zzz.R in the R directory of the package source, where the package contains functions foo(), bar(), clyde(), and irving() which all query options("melvin") and take some action based on the value of

Apologies for the off-topic question; as usual I'm trying to draw upon the unparalleled knowledge and sagacity of the r-help list. Please reply off-list if you can help me out. A collaborator of mine found a formula we need, on sheets which he had photocopied out of a book, some years ago. He cannot remember which book (he's getting to be as senile and forgetful as I am, poor bloke!).

I don't know from the nortest package, but it should ***always*** be the case that you test hypotheses H_0: The data have a normal distribution. vs. H_a: The data do not have a normal distribution. So if you get a p-value < 0.05 you can say that ***there is evidence*** (at the 0.05 significance level) that the data are not from a normal distribution. If the nortest package does

I just tried to install R version 1.5.1, and it is failing ``make check'', as follows: $ make check `Makedeps' is up to date. running code in 'base-Ex.R' ...*** Error code 1 make: Fatal error: Command failed for target `base-Ex.Rout' Current working directory /home1/faculty/rolf/Traal/Rtmp/R-1.5.1/tests/Examples *** Error code 1 make: Fatal error: Command failed for target

Colin Bleay wrote: > last week i sent an e-mail about dealing with errors thrown up from a > glm.nb model carried out on multiple random datasets. > > every so often a dataset is created which results in the following error > after a call to glm.nb: > > "Error: NA/NaN/Inf in foreign function call (arg 1) > In addition: Warning message: > Step size truncated due

This may be an FAQ, but a (perfunctory) search failed to turn it up. Suppose I have a function foo(...){<something>} and I want to obtain, inside foo, the names of items comprising the ``...''. E.g. if I call foo(melvin,clyde,irving) I want to be able to loop through the ``...'' and successively obtain the text strings "melvin", "clyde", and

I want to do something like produce a plot title of the form ``Sample size n = 42; critical value k_0 = 17.'' where the ``n'' is to be in a maths font and ``k_0'' indicates that the 0 is a subscript. (A la LaTeX.) But the values ``42'' and ``17'' are to be substituted in from the numeric values of R objects. After a bit of struggle I found that >

I want to do something like: TH <- sprintf("%1.1f",c(0.3,0.5,0.7,0.9,1)) plot(1:10) legend("bottomright",pch=1:5,legend=parse(text=paste("theta ==",TH))) Notice that the final "1" comes out in the legend as just plain "1" and NOT as "1.0" although TH is [1] "0.3" "0.5" "0.7" "0.9"

I've built R functions to ``effect'' a particular distribution, and would like to find out if that distribution is already ``known'' by an existing name. (I.e. suppose it were called the ``Melvin'' distribution --- I've built dmelvin, pmelvin, qmelvin, and rmelvin as it were, but I need a real name to substitute for melvin.) The distribution is really just a toy

I have just installed R version 2.14.0 and tried to re-build and re-check some of the packages that I maintain. I'm getting a warning (in the process of running R CMD check on my "deldir" package): > * checking PDF version of manual ... WARNING > LaTeX errors when creating PDF version. > This typically indicates Rd problems. > LaTeX errors found: > ! Font

Suppose I have a data frame with two columns ``district'' and ``score'' --- score is numeric; district may be considered categorical. I wish to append to this data frame a third column whose entries are the ranks of ``score'' ***within*** district. I've tried fiddling about with tapply() and by() but the result is a list whose i-th component consists of the ranks of

I've looked through the FAQ and can't find anything about this. I'm working on a Sun machine, running Solaris 2.7. I'm a new R-user; have been using Splus for millenia, and finally decided it was time I got going with R. So I downloaded R, installed it, fiddled about a bit, and found that command-line editing was absent. Scrounging through the documentation some more, I saw it

Our computing services people have recently reconfigured the Sun compilers structure on our network, and I can no longer install, on our Sun/Solaris machine, a certain package (spatstat) with which I am heavily involved. (The same problem may well pertain to other packages as well; I haven't yet experimented except with spatstat.) Strictly speaking I can ***install*** it, but when I try to

I've just installed version 1.4.0 of R, and am experiencing a puzzling phenomenon with the library() function. I have .lib.loc set as follows: > .lib.loc [1] "/usr/local/lib/R/library" "/home/faculty/rolf/Rlib" If I invoke > library(melvin) I get the error message Error in library(melvin) : There is no package called `melvin' but if I invoke >