search for: res_coxphf

Hi R Users, I am very frustrated with the following code. Please do me a favor to run it. after reading into the test data set (I also pasted the data set below), the first line of code for "res_coxphf" did not work and generated the error code below. but the other three line worked well. the second line for "res_coxphf2" should be the same as the first line; I need to run more than 100 variables in a loop, so I want to do test[, i], that is why I want to use the first line. how...