Displaying 1 result from an estimated 1 matches for "intakedate_c".
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intakedate_d
2012 Jul 11
3
unable to subtract dates in R
...akeDS$DOB <- as.Date(intakeDS$DOB, "%Y%m%d")
>
> # Make IntakeDate a date variable, by first converting it from numeric to
character then from character to date
> #intakeDS$IntakeDate <- as.character(intakeDS$IntakeDate)
> intakeDS$IntakeDate_d <- as.Date(intakeDS$IntakeDate_c, "%Y%m%d")
>
> intakeDS$intake_age <- intakeDS$DOB - intakeDS$IntakeDate_d
> intakeDS$intake_age
Time differences in days
[1] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA...