search for: mckellercran

Hi all, Perhaps this is more of a unix question, but I'll give it a try here. I am running 9 different R processes at the same time (called from a shell script using R CMD BATCH). When I use the top program to monitor how they are doing, it is impossible to tell which R process is related to which R script. Is there a way to rename a specific instantiation of an R process in top with

Hi all, Probably a rudimentary question. I have a flat file that looks like this (the real one has ~10e6 elements): 10110100101001011101011 and I want to pull that into R as a vector, but with each digit being it's own element. There are no separators between the digits. How can I accomplish this? Thanks in advance! Matt -- Matthew C Keller Asst. Professor of Psychology University of

Hi, Since "R" is a (very) generic name, I've been having some trouble searching the web for this topic. Due to this, I've just created a Google Custom Search Engine that includes several of the most relevant sites that have information on R. See it in action at: http://google.com/coop/cse?cx=018133866098353049407%3Aozv9awtetwy This is really a preliminary test. Feel free to

Hi all, Is there a way to skip non-sequential lines using the "skip" argument in the scan function? E.g., I have a matrix with 100 rows and 1e7 columns. I open a connection and want to read only lines 5, 7, 9, etc [i.e., seq(5,99,2)] It might seem that the syntax to do this would be something like this (if only the "skip" allowed vectors in the same way colClasses does in

...ng. If not, I suggest you use the CRAN version of the package and create a reproducible example (check it with package reprex) and try again here, or ask one of the maintainers of that package. -- Sent from my phone. Please excuse my brevity. On October 2, 2017 8:56:46 AM PDT, Matthew Keller <mckellercran at gmail.com> wrote: >Hi all, > >I used to use fwrite() function in data.table but I cannot get it to >work >now. The function is not in the data.table package, even though a help >page >exists for it. My session info is below. Any ideas on how to get >fwrite() >to wor...

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Hi all, I used to use fwrite() function in data.table but I cannot get it to work now. The function is not in the data.table package, even though a help page exists for it. My session info is below. Any ideas on how to get fwrite() to work would be much appreciated. Thanks! > sessionInfo() R version 3.2.0 (2015-04-16) Platform: x86_64-unknown-linux-gnu (64-bit) Running under: Red Hat

hi all, I'm full of questions today :). Thanks in advance for your help! Here's the problem: x <- c('18x.6','12x.9','302x.3') I want to get a vector that is c('18x','12x','302x') This is easily done using this code: unlist(lapply(strsplit(x,".",fixed=TRUE),function(x) x[1])) So far so good. The problem is that x is a vector

Hi all, I've had one of my most miserable R weeks in memory. I'm trying to deal with huge datasets (>1GB each) but am running up against those pesky memory limits. The libraries filehash and g.data are not very suitable for what I need. I haven't gotten into the sql thing yet. Most recently I've been trying to install the new package ff (not yet on the CRAN repository). I

Hi all, This is probably a blindingly obvious question: Why does it matter in the uniroot function whether the f() values at the end points that you supply are of the same sign? For example: f <- function(x,y) {y-x^2+1} #this gives a warning uniroot(f,interval=c(-5,5),y=0) Error in uniroot(f, interval=c(-5, 5), y = 0) : f() values at end points not of opposite sign #this doesn't give a

...OM Version: MP11.005C.B08 SMC Version: 1.7f10 Serial Number: G87052SGUPZ System Software Overview: System Version: Mac OS X 10.5.4 (9E17) Kernel Version: Darwin 9.4.0 Boot Volume: Macintosh HD Boot Mode: Normal ----- Original Message ---- From: Matthew Keller <mckellercran at gmail.com> To: Steven McKinney <smckinney at bccrc.ca> Cc: joseph <jdsandjd at yahoo.com>; r-help at r-project.org Sent: Saturday, July 26, 2008 9:15:41 AM Subject: Re: [R] 64-bit R on Mac OS X 10.4.5 Hi Joseph, For what it is worth (which might not be that much!), I have writte...

Hello all, I hate to add to the daily queries regarding R's handling of large datsets ;), but... I read in an online powerpoint about the ff package something about the "length of an ff object" needing to be smaller than .Machine$integer.max. Does anyone know if this means that the # of elements in an ff object must be < .Machine$integer.max [i.e., that ff provides no help with

Hi all, I have a vector, most of which is missing. The data is always increasing, but may do so in jumps. I would like to interpolate the NAs with 'best guesses', using something like filter(), which doesn't work due to the NAs. Here is an example: > x <- c(2,3,NA,NA,NA,3.2,3.5,NA,NA,6,NA) > x [1] 2.0 3.0 NA NA NA 3.2 3.5 NA NA 6.0 NA I would like a function that

Hello all, I have some genetic datasets (gzipped) that contain 6 columns and upwards of 10s of billions of rows. The largest dataset is about 16 GB on file, gzipped (!). I need to sort them according to columns 1, 2, and 3. The setkey() function in the data.table package does this quickly, but of course we're limited by R not being able to index vectors with > 2^31 elements, and bringing

Hello, I've searched for an answer to no avail. I am wondering if anyone knows how to constrain certain correlations to be equal. I have family data with 2 twins per family plus up to 2 siblings. I would like to somehow constrain all the sibling correlations (twin-sib and sib-sib) to be the same while allowing the twin-twin correlation to be different. Here is some simulated code:

Hi all, I'm on a Linux server with 48Gb RAM. I did the following: x <- big.matrix(nrow=20000,ncol=500000,type='short',init=0,dimnames=list(1:20000,1:500000)) #Gets around the 2^31 issue - yeah! in Unix, when I hit the "top" command, I see R is taking up about 18Gb RAM, even though the object x is 0 bytes in R. That's fine: that's how bigmemory is supposed to

Hi all, My graduate student is logging onto my macpro and running R through ESS aquamacs (with Mx ssh and then Mx ess-remote). Everything is working fine until we get to graphing. We are trying to give him the ability to look at graphics interactively. The ESS manual is not too helpful: "If you run X11 (See Section 13.3.2 [X11], page 68, X-windows) on both the local and remote machines

Hi all, SETUP: I have pairwise data on 22 chromosomes. Data matrix X for a given chromosome looks like this: 1 13 58 1.12 6 142 56 1.11 18 307 64 3.13 22 320 58 0.72 Where column 1 is person ID 1, column 2 is person ID 2, column 3 can be ignored, and column 4 is how much chromosomal sharing those two individuals have in some small portion of the chromosome. There are 9000 individual people, and

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'm giving a talk in a few days to a group of psychology faculty and grad students re the R statistical language. Most people in my dept. use SAS or SPSS. It occurred to me that it would be nice to have a few concrete examples of things that are fairly straightforward to do in R but that are difficult or impossible to do in SAS or SPSS. However, it has been so long since I have used