Re: [R] basehaz() in package 'Survival' and warnings() with coxph

Okay the data sets dat1 and dat 2 are the same dat1 just has fewer covariates. David, I understand your concern with the number of events and number of variables I am using however. 611 is only the unique times at which the events occur where as there are 6987 events in my data of 77272 observatio

Re: [R] basehaz() in package 'Survival' and warnings() with coxph

My sessionInfo is as follows: R version 2.15.1 (2012-06-22) Platform: x86_64-unknown-linux-gnu (64-bit) locale: [1] LC_CTYPE=en_GB.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_GB.UTF-8LC_COLLATE=en_GB.UTF-8 [5] LC_MONETARY=en_GB.UTF-8LC_MESSAGES=en_GB.UTF-8 [7] LC_PAPER=C

[R] Imputation using package mi

I am unsure if the package mi uses MICE because I can specify the number of iterations for the mi functions. Also on a side note: I have a large data set with 300+ covariates (some are have missing values). So I was wondering if I should use all the complete covariates for the imputation models

[R] basehaz() in package 'Survival' and warnings() with coxph

Hello, I have a couple of questions with regards to fitting a coxph model to a data set in R: I have a very large dataset and wanted to get the baseline hazard using the basehaz() function in the package : 'survival'. If I use all the covariates then the output from basehaz(fit), where fit is a m