Running a set of codes given in R for regression analysis

Hi

I checked with my course teaching assistant about the data frame you asked. I was told that the R program

packages: Survival, and Survminer contain the data regarding ethnicgroups. I installed the two packages successfully and loaded them on R to test it successfully using the Library/ Require command.

The TA said that this quiz simply asks us to run the code provided and we should get the same output as the one provided by my prof. My issue was that when I ran the code provided I had error messages regarding ‘g’ not found.

I talked to another classmate , he showed me his code and ran it with an answer of p=0.260 . Please let me know what did I do wrong. Why did I keep getting error messages when all the data was in the R packages.

My classmate was able to get an answer even though it was apparently wrong. I could not get passed the error messages.

The following was my friend’s response to my query to him.

“ I'm doing the following code and getting an answer of p=.260 which is incorrect according to the quiz. I've gone back to the beginning and reset my variables so I have no idea why this is not working.

I am running:

gender <- as.factor(g[,"gender"]) # R calls categorical variables factors

fu_time <- g[,"fu_time"] # continuous variable (numeric)

death <- g[,"death"] # binary variable (numeric)

fit <- coxph(Surv(fu_time, death) ~ gender) # fit the desired model

temp <- cox.zph(fit) # apply the cox.zph function to the desired model

print(temp) # display the results

Please go over my printout of my attempt at running the codes provided by my prof. Let me know Please. Thanks.