I wrote the following script in R software in order to converting date format in a prospective cohort data. But, I got an odd error. Could everyone help me?
Code:
for(col in colnames(outcome)){
if(startsWith(col, "eventdate_")){
outcome[, col]
Salvatore S. Mangiafico
I don't think anyone will be able to help you without a reproducible example. For example, the following works.
#####
Location = rep(c("Home", "Away"), 5)
eventdate_alpha = c(rep("2017-05-06", 5), rep("2015-07-18", 5))
outcome = data.frame(Location, eventdate_alpha)
for(col in colnames(outcome)){
if(startsWith(col, "eventdate_")){
outcome[, col]
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