similar to: Date object

Hi, I have dates as follows: 1/4/2006 0:00:00 AM It is a factor at present. How do I find out the day of the week from this? How do I convert to Julian date format? Thanks. Chetty -- Professor of Family Medicine Boston University Tel: 617-414-6221, Fax:617-414-3345 emails: chettyvk@gmail.com,vchetty@bu.edu [[alternative HTML version deleted]]

Hi, When I import an excel "CSV" file, large numbers such as " 43988014.3" is imported as "43988014", leaving out the decimal ".4". How to import keeping the fraction? Thanks. Chetty -- Professor of Family Medicine Boston University Tel: 617-414-6221, Fax:617-414-3345 emails: chettyvk@gmail.com,vchetty@bu.edu [[alternative HTML version deleted]]

Hi, I have set up two monitors. I am using windows XP. I would like to keep one window- command line in one monitor and the script and graphs in the second monitor. How do I set it up? It works for word documents simply by dragging the document. It does not work if I drag and drop the scripts window. Is R not compatible for this? Thanks. Chetty -- Professor of Family Medicine Boston University

Hi , Name rate HEALTHALLIANCE HOSPITALS, INC -1.06211747 MOUNT AUBURN HOSPITAL 0.50960291 STURDY MEMORIAL HOSPITAL 2.64233232 LAWRENCE GENERAL HOSPITAL 2.15628558 CAMBRIDGE HEALTH ALLIANCE 1.23623144 I would like use

Hi,I would like add a horizontal line at 126 (col=red) and a vertical line at 6.5 ( col= blue) in each panel .How should I use the panel.abline function in the following code I am using: ------------------ library(lattice) with(reg.dat.5,coplot(lbxglu~lbxgh|eth,panel=panel.smooth,xlab="ABC", ylab="FBG")) ---------------------------------------- Thanks a lot. Professor of

Hi,I am using the amazing package 'plyr". I have one problem. I would appreciate help to fix the following error: Thanks. ______________________________ > library(plyr) > data(baseball) > summarise(baseball, + duration = max(year) - min(year), + nteams = length(unique(team))) Error: could not find function "summarise" > ddply(baseball, "id", summarise, +

Hi, This happens when I read in large numbers; ------------------------------------ > as.numeric(4398801.3) [1] 4398801 > as.numeric(439880.3) [1] 439880.3 ------------------------------------ Please help to read in numbers with more than 8 characters! Thanks. Chetty -- Professor of Family Medicine Boston University Tel: 617-414-6221, Fax:617-414-3345 emails:

Hi, Please help to correct my error in the following. I want to plot the values of 'x" in increasing order. ----------------------------------- library(lattice) Name<-c("A","B","C") x<-c(15,20,10) test<-data.frame(Name,x) dotplot(Name~x,test) dotplot(reorder(Name,x)~x,test) "reorder" has no effect! Thanks. Chetty ------------------------

Hi,I would like to reshape the following "wide" data set to "long" form. I would appreciate help with the correct code for "reshape". I tried a few unsuccessfully. Thanks. Chetty __________________________________________________ dat.1 Grp X0 X3 X6 X12 X25 X501 C 0.5326517 0.6930942 0.9403883 1.157571

I would appreciate any help for the following question. How to increase the font size of labels for the x and y axes in the following code? --------------------------------- xyplot(lbxglu~lbxgh|eth,reg.dat.5, panel = p, col = 1:2, par.strip.text = list(cex = 1.25,col="brown"), xlab="A1C",ylab="Fasting Plasma Glucose", main="FPG") p <- function(..., col)

Hi,I would like to fill the dots in this graph. I would appreciate help to do that if possible. If fill is not possible, can I make it bright? I do NOT want to increase the size. __________________ dotplot(hu.event~fitted.adj.cat,data=risk.benefit.cast,groups=treat, auto.key=list(space="right")) ------------------------------------------ Thanks. Chetty -- Professor of Family Medicine

Hi ,When I try to load the 'mgcv" package, often, but not always, get this error message. What am I doing wrong? __________________ This is mgcv 1.4-1.1 Error in runif(1) : .Random.seed is not an integer vector but of type 'list' Error : .onAttach failed in 'attachNamespace' Error: package/namespace load failed for 'mgcv' -----------------------------------------

Hi,In SPlus, I use the function 'cluster' with GLM to adjust for correlated errors within a cluster ( e.g. cluster(ID)) as a covariate. Is there a similar function in R to use with GLM ? I am new to R. Thanks. V.K. Chetty -- Professor of Family Medicine Boston University Tel: 617-414-6221, Fax:617-414-3345 emails: chettyvk@gmail.com,vchetty@bu.edu [[alternative HTML version deleted]]

Hi , I have created a parallel coordinate plot using rrgobi. I like to make a powerpoint slide. I am not able to copy and paste. Is there any way to do this? Thanks for any help. Chetty -- Professor of Family Medicine Boston University Tel: 617-414-6221, Fax:617-414-3345 emails: chettyvk@gmail.com,vchetty@bu.edu [[alternative HTML version deleted]]

Hi,Can I use "reorder" function with barchart as in dotchart? Here are some codes which do not work for me. Thanks Chetty ___________________________ a1c.cast$bmi.cat.reordered[a1c.cast$eth!="Other"] <-with(a1c.cast[a1c.cast$eth!="Other",],reorder(bmi.cat.ordered[a1c.cast$eth!="Other"], BP.FN.RATE,median )) barchart(BP.FN.RATE~

Hi,In Lattice graphs, can I use "reorder" function in a barchart as in the case of "dotchart"? Or it can be used only with dotcharts? Thanks Chetty Professor of Family Medicine Boston University Tel: 617-414-6221, Fax:617-414-3345 emails: chettyvk@gmail.com,vchetty@bu.edu [[alternative HTML version deleted]]

Hello, I'm having some trouble trying to set the .libPaths() on Windows 7, R-2.15.0 and R-2.15.1. The environment variables R_LIBS and R_LIBS_USER are set according to the help page for .libPaths() and the Rprofile.site file has the default setting, as shown below. R-2.14.1 recognizes the lib paths but not R-2.15. Is this a bug or am I doing something wrong? (I've also tried with

If no 'type' is specified, download.packages("pkgname") will download source packages (.tar.gz files), even on Windows. However, the help says type character string, indicate which type of packages: see install.packages. and on Windows, install.packages defaults to downloading binary packages. Is this intended behaviour on the part of download.packages? This is on R

I tried this on a Linux (Ubuntu) server invoking R from the command line and the result was the same, except that I could kill the R session from another terminal window. From: Rui Barradas <ruipbarradas at sapo.pt> To: Chris Triggs <cm.triggs at auckland.ac.nz>; "r-devel at r-project.org" <r-devel at r-project.org> Cc: Thomas Lumley <t.lumley at

Hi... I have come upon a problem with a regular expression which causes base-R to freeze. I have reproduced the phenomenon on several machines running R under Windows 10, and also under OSX on different Apple MACs. The minimal example is:- Oldterm is a vector of characters, e.g. "A", "B", "A", "*", "B" The regular expression is