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46 results for “from:Luc Villandre”

random slope models with lme --> failured to converge
Luc Villandre · Feb 5, 2010 · r-help

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Searching within a ch. string
Luc Villandre · May 11, 2009 · r-help

Hi Ron, Look up the grep() function. Cheers, -- *Luc Villandr?* /Biostatistician McGill University Health Center - Montreal Children's Hospital Research Institute/ RON70 wrote: > Hi all, is there any function to find some words in a character-string? For > example suppose...

method ML
Luc Villandre · Apr 14, 2009 · r-help

Hi Joe, You're using the lme() function? If so, then adding /method = "ML" / to the argument list should do the trick. Cheers, Luc joewest wrote: > Hi > > I am doing lme models and they are coming out using the REML...

approximation function
Luc Villandre · Apr 6, 2009 · r-help

Hi, This is a rather broad question. The function lowess() might be a good place to start, I guess (although I'm not sure whether this fits in your definition of "approximation functions"...). Best of luck, Luc carol white wrote...

Best way to turn a list into a data.frame
Luc Villandre · Apr 6, 2009 · r-help

Hi Daniel, In your case, I guess you could use: col1 = rep(attributes(my.list)$names,lapply(my.list,length)) ; col2 = unlist(my.list,use.names=FALSE) ; my.data.frame = as.data.frame(cbind(col1,col2)) ; This should work well...

Factor to continuous
Luc Villandre · Apr 14, 2009 · r-help

Hi, You'll need to be more specific about the nature of your problem. Could you describe what exactly you're trying to do and why you need to transform factors into continuous variables? Could you also provide a small...

number of zeros in a matrix -row by row
Luc Villandre · Apr 6, 2009 · r-help

Hi, Try /rowSums(M==0)/ This should work just fine. Cheers, Luc onyourmark wrote: > Hi. I have an n x m matrix M some of who's entries are zeros. I want to know > how many zeros there are in...

How this addition works?
Luc Villandre · May 28, 2009 · r-help

bogaso.christofer wrote: > I have following addition : > > > > >> 1:2 + 1:10 >> > > [1] 2 4 4 6 6 8 8 10 10 12 > > > > I could not understand how R adding those two unequal vector? Any help? > > > [[alternative HTML version deleted]] > > ______________________________________________ > R...

Kate terminal window
Luc Villandre · May 20, 2010 · r-help

Dear R-users, I've recently switched to Ubuntu and I've decided to use Kate to edit my R code. I really like how Kate allows one to simply pipe their code to the terminal. However, I would find...

[OT?]R Reference Manual review/recommend
Luc Villandre · May 13, 2009 · r-help

AG wrote: > Hello all > > I am looking to learn R and was thumbing through volume 1 of "R > reference manual - Base Package". I'm sorry if this is ludicrously > silly to ask, but is this book worth the investment as...

How to load data from Statistics Canada
Luc Villandre · May 20, 2009 · r-help

guox at ucalgary.ca wrote: > We would like to load data from Statistics Canada > (http://www.statcan.gc.ca/) using R, > for example, Employment and unemployment rates. > It seems to me that the tables are displayed in HTML. > I was...

excluding NAs in data frame without deleting rows
Luc Villandre · May 29, 2009 · r-help

Wade Wall wrote: > Hi all, > > I have a binary matrix with NAs included. Each row and column > includes at least one NA, so I don't want to omit them. Is there a > way to sum across rows and columns...

lme between-group and within-group covariance
Luc Villandre · Apr 1, 2009 · r-help

Dear R users, I would be interested in using the lme() function to fit a linear mixed model to a longitudinal dataset. I know this function allows for the specification of a within-group covariance structure. However, does it allow...

Need to clean a table, and compute mean and SD
Luc Villandre · May 4, 2009 · r-help

Thom_249 wrote: > Hi > > For a school project I have a file with 120 columns and ~2000 lines. This > file contains timestamps of spike detected in 60 channels, and the time > elapsed between the last spike. > > I need to clean...

group by-like statement for 2-row matrix
Luc Villandre · Apr 7, 2009 · r-help

Hi Henning, Although there might be a better way to do this, I'd suggest (with my.matrix being the matrix you provided): complete.vector = rep(my.matrix[1,],my.matrix[2,]) ; table(complete.vector) ; Is this what you're...

Frequency table to histogram
Luc Villandre · Apr 7, 2009 · r-help

Hi Mary, Could you please provide a copy of the first few lines of your frequency table (with only relevant columns)? I think this could help many potential contributors understand in more details what you're trying to do. Cheers...

remove object
Luc Villandre · May 29, 2009 · r-help

fernando espindola wrote: Hi list.... I try to remove all object less one, this object is called index. I have many object with different names and pattern option in ls function may not remove this object why any word in...

ggplot: Problem with legend background
Luc Villandre · Dec 11, 2009 · r-help

Dear R-users, I am preparing graphs for an upcoming article using the different functions of the ggplot2 package and I've been having problems with the legend background. It doesn't seem to scale when the text size is...

Help to extract results from lme.object
Luc Villandre · May 8, 2009 · r-help

Auston wrote: > Hi list, > > Would someone please give me a hint how to extract the between and within > subject StdDev from "lme" fit? Below is the output from the fit, but I couldn't > find the number 0.3927714 anywhere...

Pulling data into a model
Luc Villandre · Apr 8, 2009 · r-help

Hi Jacy, I'll take my chances answering your question. I'd suggest using the paste() function and then transforming the string into a formula object: my.formula = as.formula(paste("y~x1+x2+",paste(colnames(REG)[2:num],collapse...

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