search for: isubirana

...alysis Cox model by computing a ROC curve and area under the curve for a fixed time (5 years), taking into account that the response is not binary but right censored. So, is there a function that computes a ROC curve under right censored survival data? Thank you in advance. Isaac Subirana: isubirana@imim.es Institut Municipal d'Investigació Mèdica (IMIM), Barcelona (Spain) [[alternative HTML version deleted]]

...pss' function from the 'foreign' package. Is there a function in R that solves this 'length variable names' problem; so that the names of the variables of the imported R data base be the same as the names of the original SPSS data base? Thanks in advance! Isaac Subirana (isubirana@imim.es) [[alternative HTML version deleted]]

...ow to perform a Cox model analysis for right truncated data? All my data is right truncated, since I only have patients who entered in a hospital for a particular desease, and I would like to modelate the age at hospital entrance as the response variable. Thanks in advance. Isaac Subirana. isubirana@imim.es -------- La informació continguda en aquest missatge i en qualsevol fitxer adjunt és confidencial, privada i d'ús exclusiu per al destinatari. Si no és la persona a la qual anava dirigida aquesta informació, si us plau, notifiqui immediatament l'enviament erroni al remitent i es...

Hi, Anybody knows a function that can fit haplotype data to a Cox model. I've been searching it in the web without succeed. I use "haplo.stats" package, but unfortunatelly it's not possible to analyse survival data, amb I right?. Thanks in advance. Isaac Subirana (isubirana@imim.es) [[alternative HTML version deleted]]

...n as the SPSS command "DISPLAY DICTIONARY". I know the read.spss function in the package foreign, but it doesn't give either the missing values defined by the user under SPSS or the format variables (for example if they are dates or not). Thanks in advance. Isaac Subirana (isubirana@imim.es) [[alternative HTML version deleted]]

Hi everybody, Does anyone know a function to compute the attributable risk of a factor in a logistic regression or a proportional hazard cox model (both with confounding variables)? I need also obtain the confidence interval. Thanks in advance. Isaac Subirana. -------- La informació continguda en aquest missatge i en qualsevol fitxer adjunt és confidencial, privada i d'ús exclusiu

Hi, Does anybody know how to obtain the imputed SNP genotype probabilities from the snpStats package? I am interested in using an imputation method implemented in R to be further used in a simulation study context. I have found the snpStats package that seems to contain suitable functions to do so. As far as I could find out from the package vignette examples and its help, it gives the

Dear R users, I am building a packaged where I want to use the "update.formula" function, but modifying the option "simplify = TRUE" to "FALSE". Since this is not an argument, I modified the code and created a new function as: update.formula2 <- function (old, new, ...) { tmp <- .Internal(update.formula(as.formula(old), as.formula(new))) out <-

I have a question about how to compare a GLM with a GAM model using anova function. A GLM is performed for example: model1 <-glm(formula = exitus ~ age+gender+diabetes, family = "binomial", na.action = na.exclude) A second nested model could be: model2 <-glm(formula = exitus ~ age+gender, family = "binomial", na.action = na.exclude) To compare these two GLM