similar to: lm design matrix bug?

(Apologies the previous version was sent as rich text) Hello, I'm new to R, but I've read the intro to R and successfully connected it to an instance of mysql. I'm trying to perform multiple linear regression, but I'm having trouble using the lm function. To start, I have read in a simply y matrix of values(dependent variable) and x matrix of independent variables. It says both

Help! I accidentally saved my work as an .rdata format instead of .txt I need to somehow get it saved as a .txt file otherwise i'm really in trouble! Does anyone know how to convert .rdata to .txt files?? I also tried re-loading the file into R to see if i can re-save it but it doesnt work! i've attached it below... please help me asap! i need to turn it in as a .txt file Thanks

Dear R community, I used a linear mixed model (named lm11) to model daily soil temperature depending upon vegetation cover and air temperature. I have almost 17,000 observations for six years. I can not account for autocorrelation in my model, since I receive the error message after applying the function: update(lm11, corr=corAR1()) Error: cannot allocate vector of size 220979 Kb Do

Dear R community, I used a linear mixed model (named lm11) to model daily soil temperature depending upon vegetation cover and air temperature. I have almost 17,000 observations for six years. I can not account for autocorrelation in my model, since I receive the error message after applying the function: update(lm11, corr=corAR1()) Error: cannot allocate vector of size 220979 Kb Do

Hi all - I'm trying to find a way to create dummy variables from factors in a regression. I have been using biglm along the lines of ff <- log(Price) ~ factor(Colour):factor(Store) + factor(DummyVar):factor(Colour):factor(Store) lm1 <- biglm(ff, data=my.dataset) but because there are lots of colours (>100) and lots of stores (>250), I run it to memory problems. Now, not every

Hi All - I recently moved to Vista and reinstalled R. I am able to run R as I typically do (R.exe from the command prompt), and it can work well. However, if I switch windows to, say, firefox or excel or anything else, when I return to the R prompt it no longer works. I am able to use the up and down arrow keys to access previous commands, but no other key stroke has any impact. As long as I

Dear useR, x is a character string In R: > x<- '32159_3' Which function could enable me to determine the position of underscore in x? In here, the underscore is on the 6th digit of x. --- Yours Sincerely Leon [[alternative HTML version deleted]]

Hi everyone, suppose I have a 2D matrix, is there a command to snip out a specific row/column and then remerge the remaining columns/rows back into a contiguous matrix? I will need to repeat this operation quite a bit(reverse selection). Thanks for any insights you can offer. Yifei

Hi all. A question for knowledgeable folks using R on an Intel Mac running OS X 10.4.10 For ease of maintenance, I have broken a large R script into a main script which ?oversees? things by calling other scripts, using ?source?. Let?s call the secondary scripts ?sub-scripts.? I?d like for the sub-scripts to reside in a different directory (again, for ease of maintenance, and so I can access

Hi R-Experts, I'm having a problem with reading a large data file which is in .csv format and size is 120 MB (app.). I was trying to use RODBC package but I found RODBCconnectExcel function only. And can I convert this file to .dbf format? How can I read this file? And also let me know if this was a file in .sas7bdat format, what should I do? Thanks in advance.

Hi all, My apologies for a very simple question. I just downloaded R 2.6.0. I want to bring in all of the objects from 2.5.0 that I see when I type ls(). I have no idea how to do that. Thanks in advance. David -- ======================================================================= David Kaplan, Ph.D. Professor Department of Educational Psychology University of Wisconsin - Madison

Hi All I dont know if anyone else has noticed the same thing, but with 2 subsequent runs of the same syntax, I am getting exactly the same results. I was expecting that results differ slighlty, say in the 4th or 5th decimal place. Is this a specialty with R2WinBUGS? Does it have something to do with the seed value? Isnt the seed value reset everytime I restart winbugs? Thanks Toby

Hi all. i am desperating. i need a matrix of p.values from an chi square test. i had it already work but than my computer collapsed when taking the whole data set 800x260 into account. i am sure it looked like this but it doesn't work now. can anybody help me? thanks in advance. x=read.table("C:\...) d=ncols(x) z<=matrix(0,d,d) for(i in 1:d) for(j in 1:d)

Hi All I am pretty new to R but saw stata and sas's macro facilities and am looking for how such things work in R. I am trying to piece together a series of statements: n = 5 #want to have it dynamic with respect to n for (j in 1:n) { eval(paste("x", j, "=x[", j, "]", sep="")) } I want the created statements 'x1=x[1]' immediately executed

I was reading the help but just did not get how to specify starting values for varIdent() of the lme() function, although I managed to do it for corSymm(). Do I specify the values just as they are printed out in an output, like c(1, 1.3473, 1.0195). Or do I need to take the residual and multiply it with these like c(0.2235, 0.2235*1.3473, 0.2235*1.0195) or any other form that I dont know of?

Dear R community, Below you may find the details of my model (lm11). I receive the error message "Error: cannot allocate vector of size 220979 Kb" after applying the autocorrelation function update(lm11, corr=corAR1()). lm11<-lme(Soil.temp ~ Veg*M+Veg*year, data=a, random = list(Site=pdDiag(~Veg), Plot=pdDiag(~Veg))

Hi all, This question involves using a "for" loop to make a "decision" in a script. I've written a rather intricate script, and near the start of it, I want it either to do a loop (if a variable called "number.runs" > 1) or not do a loop (if "number.runs" is 1). This is probably trivial but I can't figure it out. Here's a self-contained

Hi All I was wondering if I can avoid a time-consuming for loop on my 600000 obs dataset. school_id y 8 9.87 8 8.89 8 7.89 8 8.88 20 6.78 20 9.99 20 8.79 31 10.1 31 11 There are, say, 143 different schools in this 600000 obs dataset. I need to thave sequential identifiers, 1,2,3,4,5,...,143. I was using an

Do I miss here something? dtaa = read.table("http://www.ats.ucla.edu/stat/mplus/examples/ma_snijders/mlbook1.dat", sep=",") head(dtaa) # shows the data as it should be save(dtaa,"dtaa",file="c:/dtaa") d = load("c:/dtaa") head(d) # all data is lost, it only shows [1] "dtaa" "dtaa" Thanks for your hint on this.

Hi, I am planning on putting some R script in an appendix of a LaTex document. Can anyone recommend me a way of how to format it? Is there a way to keep all line breaks without having to insert \\ in every single line? Thank you! Benjamin