similar to: Is there string class in R?

Hi, I am trying to use piecewise linear regression to approximate a nonlinear function. Actually, I don't know how many linear functions I need, therefore, I want build an array of regression models to automate the approximation job. Could you please give me any clue? Attached is ongoing code: rawData = scan("c:/zyang/mass/data/A01/1.PRN", what=list(numeric(),numeric())); len =

R Users: How can I catch R errors and depend on this error call other R functions in Perl? The foolowing is the error message when I use perl call R. Error in nls(modout ~ exp(-b1 * modin)/(b2 + b3 * modin), trace = F, start = c(b1 = 0.005, : singular gradient Segmentation fault Thanks, Zhongming

Hi, I use lm or loess to make smoothing. After smoothing I need "Residual Standard Error" in my script. Could you please tell me how can I get this information? Thanks,

Dear All: I need draw some figure through trellis.device and save them as pdf files. How can I close trellis.device (something like dev.off() in nonlattice figure)? Many thanks Zhongming Yang --------------------------------- [[alternative HTML version deleted]]

Thank you. I was just replying my own message with the same information. Sorry for not doing the research properly before filing. Cheers Joris On Sat, Mar 24, 2018 at 11:36 AM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > On 24/03/2018 6:16 AM, Joris Meys wrote: > >> Dear all, >> >> while preparing some exercises I came across some highly surprising

Dear all, while preparing some exercises I came across some highly surprising behaviour of file.exists(). The specific value "prn.us.txt" always returns TRUE, even though that file is nowhere to be found on my system. In a fresh R session 3.4.4 installed on Windows 10: > grep("prn.us.txt", dir(recursive = TRUE)) integer(0) > file.exists("prn.us.txt") [1] TRUE

R 1.6.1 on Windows NT4: The boxplot() function appears to draw its own tick marks and axis values even when called with add=TRUE. As a toy example, try x <- rnorm(100) f <- factor(rep(1:4, each=25)) plot(c(0,4), c(-3,3), type="n", xaxt="n", yaxt="n") boxplot(x ~ f, add=TRUE) My expectation is that a high-level plotting function will not mess with the axes

I'm trying to write a package which uses classes/methods as defined in the `methods' package. I have a single .R file which defines the class and various methods for that class. At the top of the file I have require(methods) and then setClass("myclass", ...) setGeneric("intersect") setMethod("intersect", "myclass", function(x,y) ...) I noticed

r-help, I can't seem to get the below data organized in such a manner so as to generate a contour plot using any of the functions {lattice.contourplot, base.contour, base.filled.contour}. I was wondering if anyone could please tell me what I need to do to accomplish this. X,Y,Level -31.105,86.911,3843 -3.385,86.911,3896 24.335,86.911,3874 -24.175,79.700,3900 -3.385,79.700,3927

Hi, I'm a new R user. My goal is to do a variogram using geoR. I started by trying to do the example in the geoR Illustrative Session using my own data. I am able to read in my Ascii data using: D <- matrix(scan("file.dat", n=530*3), 530,3, byrow=TRUE). Then I use: as.geodata(D, coords.col=1:2, data.col=3) to make the object D geodata. I check the descriptive statistics,

Dear Experts, I need to calculate the cdf of the standard normal distribution, i.e. H(x) = 1/sqrt(2*pi) integral(exp(-z^2/2) dz), where z is b/w -infi to infi. I know there should be a way to do it in R, but did not know to do it. I'd appreciate any help you could offer. Charlie Liu Graduate student intern at EPA/ECO

Has anyone tried to build r-devel on a RedHat 7.1 with the gcc 3.1.1 compiler? I didn't have problems with gcc 2.95.x or gcc 3.0.4, but when I ran the configure with gcc 3.1.1 I got the following error: [...] checking whether gcc accepts -M for generating dependencies... yes checking whether gcc supports -c -o FILE.lo... yes checking how to get verbose linking output from g77... -v checking

Hi all, Although R seems to have jpeg() and png() functions that converts data into jpeg and png formated files, it doesn't have functions the other way around. Does one of R contributed packages have gif, jpeg and png image readers? I did help.search() but no luck Regards, Jonathan -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

How do I post text-string dates along the x-axis instead of the excel_date position values? I would like to plot a time-series of chemical values changing with time The first column is the internal date from excel. This should be the x-axis position of a graph of the plotted data. The second column is a text-string of date. This should be what is posted (instead of the excel_date). The third

_ platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 1 minor 6.2 year 2003 month 01 day 10 language R > Until this version, I've not had to explicitly start the x11 device. Now,

I ran into a problem trying to make a plot from a file that's read using source. Basically, I have the following code in a file "plot.R" : library(nlme) data(Loblolly) fm1 <- nlme(height ~ SSasymp(age, Asym, R0, lrc), data = Loblolly, fixed = Asym + R0 + lrc ~ 1, random = Asym ~ 1, start = c(Asym = 103, R0 = -8.5, lrc = -3.3))

Hi, I'm faced with the following problem and would appreciate some advice. I could have a data frame x that looks like this: aa bb a 1 "A" b 2 "B" The advantage of this is that I could access all the individual components easily. Also I could access all the rows and columns easily. Alternatively, I could have a list of

In the current R-devel sources, the `pgamma' function gives a warning when the `shape' argument is passed as a vector of length > 1. That is, > pgamma(3, 1) [1] 0.950213 > pgamma(3, c(1, 2)) [1] 0.9502129 0.8008517 Warning message: the condition has length > 1 and only the first element will be used in: if (shape <= 0) stop("shape must be strictly positive")

Does the function 'matmult' still exist in R? It has a help page and is referenced in the help page for 'kronecker', but I can't seem to access the function itself. Obviously, not an issue of great concern but just a curiosity. > version _ platform i386-pc-mingw32 arch i386 os mingw32 system i386, mingw32 status

>From "R Installation and Administration:" Note that the BLAS library will be used for several add-on packages as well as for R itself. This means that it is better to use a shared BLAS library, as most of a static library will be compiled into the R executable and each BLAS-using package. Is there an idiots guide on how to do this (or should idiots just not try).