Dears, I am trying to undertake a survival analysis, however, flexsurv doesnt work with me.
install.packages("flexsurv")
library(flexsurv)
fitW <- flexsurvreg(Surv(eventtime,status) ~ factor(trt), data=dataset, dist= "gammaPH")
library(flexsurv)
Error: package or namespace load failed for ‘flexsurv’:
object ‘all_of’ is not exported by 'namespace:tidyselect'
fitW <- flexsurvreg(Surv(eventtime,status) ~ factor(trt), data=dataset, dist= "gammaPH")
Error in flexsurvreg(Surv(eventtime, status) ~ factor(trt), data = dataset, :
could not find function "flexsurvreg"