# How does one pass arguments to a function, such as coxph, that itself is inside a function?

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## How does one pass arguments to a function, such as coxph, that itself is inside a function?

 Question summary: How does one pass arguments to a function, such as coxph, that itself is inside a function. I am trying to write a function that will allow me to call coxph using different outcome and time variables. The coxph works when the coxph is NOT contained in a larger function (which passes the outcome and time variable to  use), but does not work when coxph is contained in a  larger funciton. My code: fit0 <- coxph(Surv(FUtime,Death)~Age_in_years_at_A1_max+factor(Diabetes)+factor(CKD_stage)+                                                        factor(Phase1_first),data=mydata) summary(fit0) this works:  Call: coxph(formula = Surv(FUtime, Death) ~ Age_in_years_at_A1_max +                             factor(Diabetes) + factor(CKD_stage) + factor(Phase1_first),     data = mydata)   n= 350, number of events= 56                            coef exp(coef) se(coef)      z Pr(>|z|)     Age_in_years_at_A1_max  0.04618   1.04727  0.01384  3.338 0.000845 *** factor(Diabetes)1       0.12247   1.13029  0.28282  0.433 0.664991     factor(CKD_stage)3     -0.28418   0.75263  0.38744 -0.733 0.463261     factor(CKD_stage)4      0.33938   1.40407  0.36583  0.928 0.353572     factor(CKD_stage)5      0.97121   2.64115  0.40171  2.418 0.015618 *   factor(Phase1_first)1   0.02204   1.02229  0.29713  0.074 0.940868 other output deleted. But this code does not work: doit <- function(time,outcome,data){   fit0 <- coxph(Surv(time,outcome)~Age_in_years_at_A1_max+factor(Diabetes)+factor(CKD_stage)+factor(Phase1_first),data=data)   print(summary(fit0)) } doit(FUtime,Death,mydata)  Error in Surv(time, outcome) : object 'FUtime' not found I am certain I have a scoping problem, but I don't know how to solve it. John David Sorkin M.D., Ph.D. Professor of Medicine Chief, Biostatistics and Informatics University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine Baltimore VA Medical Center 10 North Greene Street GRECC (BT/18/GR) Baltimore, MD 21201-1524 (Phone) 410-605-7119 (Fax) 410-605-7913 (Please call phone number above prior to faxing) ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.