I have two columns: one concerning quantitative data (V1), the other concerning the identification of the repeated measures made on the same units (V2) ; here, there is 3 measures on the first unit,
Message de Dimitris Rizopoulos, reçu le jeudi 16 février 2006 à 09:41 : Thank you... but I have an error message: Problem in data.frameAux.list(x, na.strings = na.strings, stringsAsFactors = str..
With survReg, it is possible to get the inverse Hessian: Is it possible to get also the score matrix? More generally, how can I get all the steps of the procedure? A sort of debugging for survReg (S
data[1,14]_1 for (i in 1:19999) { data[i+1,14]_ifelse(data[i+1,13]==data[i,13],0,1) } So if a line corresponds to the same subject as the previous line, there is a "0" in the new column, and a "1" i
Message de Dimitris Rizopoulos, reçu le vendredi 6 janvier 2006 à 10:12 : Thank you, it works perfectly. The last difficulty for me is to do the same thing for two (or more) columns: the goal is to e
Message de Tristan Lorino, reçu le vendredi 6 janvier 2006 à 14:13 : I found one solution: pasting the two columns (ident and factor) and removing the duplicates... -- Laboratoire Central des Ponts e
I have a graphic with dates in x-axis: it's available at http://daedale.free.fr/erwin/example.png All the dates can't stand together, because of their length. I would like to know if it is possible
I would like to plot 8 plots at the same y-axis scale (in order to compare them), e.g. with the same y-axis ranging from 0.6 to 2. When I specify: par(mfrow=c(4,2)) plot(...,axes=F) axis(1) axis(2,a
Thank you all for your responses. My last question: what is the best option for text font, when one exports a graph (png format) to (pdf)LaTeX? My options are "cex=.9,font=26", but the text in the s
I have two questions about PCA: 1. did someone written a script given a beautiful unit circle for the graphical representation of the initiale variables in the plane of the components? 2. how can I
I would like to import a data file containing 760,000 lines and 20 columns. S-Plus (v7) says that "the file data.txt has a file size greater than 10000000 bytes. Importing this file may fail with th
I would like to extract from a matrix A all the consecutive lines which have the same value in a specified column -- say column 4. With the following code, I determine the values which are (consecut
Is there a way to obtain all the steps in the SurvReg(Surv(...), dist="weibull"), particularly the values of the contribution of each observation to the likelihood, and the estimations at each itera