search for: subwrap1

...egarding my question on coxph and model formula, the answers worked perfectly. My new question involves the following. I want to run several coxph models (package survival) with the same dataset, but different subsets of that dataset. I have found a way to do this, described below in functions subwrap1 and subwrap2. These do not use the coxph "subset" argument, however, as you will see. My three main questions are : 1) When writing a wrapper like this, should I be using the subset argument in coxph(), or alternatively, doing what I am doing in subwrap1 and subwrap2 below? Is the...