similar to: repeating rows in R

I am trying to set up a data set for a survival analysis with time-varying covariates. The data is already in a long format, but does not have a variable to signify the stopping point for the interval. The variable DaysEnrolled is the variable I would like to use to form this interval. This is what I have now: ID Age DaysEnrolled HAZ WAZ WHZ Food onARV

hello, when i do profiles NTUSER.DAT i see this: [$$$PROTO.HIV\Software\Policies\Microsoft\SystemCertificates\TrustedPublisher] [$$$PROTO.HIV\Software\Policies\Microsoft\SystemCertificates] [$$$PROTO.HIV\Software\Policies\Microsoft] [$$$PROTO.HIV\Software\Policies] [$$$PROTO.HIV\Software\SimonTatham\PuTTY\SshHostKeys] [$$$PROTO.HIV\Software\SimonTatham\PuTTY]

R 2.7 Windows XP I have two model that have been run using exactly the same data, both fit using glm(). One model is a linear regression (gaussian(link = "identity")) the other a quasipoisson(link = "log"). I have log likelihoods from each model. Is there any way I can determine which model is a better fit to the data? anova() does not appear to work as the models have the

Hello, I have a dataset containing approx 1000 events spanning four years (2004.03 to 2008.07). For each event, I'd like to determine the time (in minutes) since the most recent final Wednesday of the month. I've found no obvious solution on the list or online; I think I'll try to use functions in the chron package. Anyone have any other advice? Thanks. M-J School of Population

I still need to do some repetitive statistical analysis on some outcomes from a dataset. Take the following as an example; id sex hiv age famsize bmi resprate 1 M Pos 23 2 16 15 2 F Neg 24 5 18 14 3 F Pos 56 14 23 24 4 F Pos 67 3 33 31 5 M Neg 34 2 21 23 I want to know if there are statistically detectable differences in all of the continuous variables in

Hi All, I'm hoping someone can help me with a relatively simple problem. Take the following dataset: ID Diabetes ESRD HIV Contact 1 0 0 NA 0 2 1 0 NA 0 3 NA 1 0 0 4 0 NA 0 1 5 1 1 1 0 I want to generate a

Dear all, I was testing the wonderful package APE. However upon testing a particular Newick's format tree - which I think to be a non-binary tree - it yields different result as expected. > library(ape) > tree.hiv <- read.tree(text="(rat,mouse,(human,chimp));") > is.binary.tree(tree.hiv) [1] TRUE Was that a bug in APE package? - Gundala Viswanath Jakarta - Indonesia

Hello Richard As discussed in the IRC channel, when merging a moderately large reg file (~35MB) to a hiv file (~118 MB); hivex generates a huge hiv file (~580 MB). These changes address that by creating a list of unallocated blocks and reassigning unused blocks. I used https://github.com/msuhanov/regf/blob/master/Windows%20registry%20file%20format%20specification.md as a reference for the

I am trying to install R in Linux 8.0 and I downloaded "R-1.7.1-1.i386.rpm" and did rpm -hiv R-1.7.1-1.i386.rpm and I am getting the following message: warning: R-1.7.1-1.i386.rpm: V3 DSA signature: NOKEY, key ID 97d3544e error: Failed dependencies: libblas.so.3 is needed by R-1.7.1-1 Then I went and look for libblas (which is a linear algebra library) that I found in

Dear all, I have a undirected network (g), representing all the sexual relationships that ever existed in a model community. I also have a directed edgelist (e) which is a subset of the edgelist of g. e represents the transmission pathway of HIV. Now I would like to superimpose the picture of the sexual relationships with arrows in a different colour, to indicate where in the network HIV was

Over a decade ago there was a problem with model.frame when the variable names were long: https://stat.ethz.ch/pipermail/r-help/2002-August/024492.html I have similar symptoms with R 2.15.3 on Windows 7: Browse[2]> x <- model.matrix(formula(myform), p$data) Error in model.frame.default(object, data, xlev = xlev) (from mice.R#601) : object is not a matrix My attempt at a work-around

I have a dataframe that contains fields such as patid, labdate, labvalue. The same patid may show up in multiple rows because of lab measurements on multiple days. Is there a simple way to obtain just the first and last record for each patient, or do I need to write some code that performs that. Thanks, Steven

hello every one, How to function more than one loop in R? I have the following problem to be solved with the a method of three loops, can you help me please? The data is attached with this message. The data is composed of two parts, cleaved (denoted by ?cleaved?) and non cleaved (denoted by ?noncleaved?). ? to access to the ith peptide, you can use X$Peptide[i] ? to access to the ith label,

R users, I am trying to find some way to find the value of a column that is repeated the most for each StandID of a dataframe. I have research methods online and the help page, but have had no success in finding a solution. I have tried using the table function but it returns items for the whole dataset and not by the StandID. Any help will be appreciated. Thanks in advance. R version 2.11.1

I am trying to combine two columns in a data frame into one column. Some values in either column are missing, but not in the same row for the two different columns. Additionally, when both columns in a row contain data, the data are identical. I want a new column with the identical data or the data from the column with observed data. For example: I have >data id x y

Hello, I am trying to run a logistic regression with random effects on proportional data in glmmBUGS. I am a newcomer to this package, and wondered if anyone could help me specify the model correctly. I am trying to specify the response variable, /yseed/, as # of successes out of total observations... but I suspect that given the error below, that is not correct. Also, Newsect should be a

Dear all, I have a quasipoisson glm for which I need confidence bands in a graphic: gm6 <- glm(num_leaves ~ b_dist_min_new, family = quasipoisson, data = beva) summary(gm6) library('VIM') b_dist_min_new <- as.numeric(prepare(beva$dist_min, scaling="classical", transformation="logarithm")). My first steps for the solution are following: range(b_dist_min_new)

Hello, Any advice or pointers for implementing Sobel's test for mediation in 2-level model setting? For fitting the hierarchical models, I am using "lme4" but could also revert to "nlme" since it is a relatively simple varying intercept model and they yield identical estimates. I apologize for this is an R question with an embedded statistical question. I noticed that a

Hi everyone, I am new to R-project. I did search through the list for my problem but i can't find it. I am sorry if this question has been asked. I would like to perform a correlation analysis between a hiv data and gene expression. Basically, i have a file that contains: hiv_name, start_position, end_position, chromosome. I would like to see if these data has anything to do with the

Does anyone know of research on the effects of rounding on regression? e.g., when you ask people "How often have you _______?" you are more likely to get answers like 100, 200, etc. than 98, 203, etc. I'm interested in investigating this, but don't want to reinvent the wheel. thanks Peter Peter L. Flom, PhD Assistant Director, Statistics and Data Analysis Core Center for