I combined datasets and I run the following function but it returned an error message indicated below. I also run a str function and I observed that the date format is displayed as mdy as is on the original datasets and the result for a numeric value is NA
Error in as.POSIXlt.character(x, tz, ...) :
character string is not in a standard unambiguous format
4/1/2019 0:02" "4/1/2019 0:03" "4/1/2019
num NA ..