Dear R Helpers
I am trying to get function smedian.hilow to work using Hmisc summarize
on variable conc in dataframe pkindivmtd by time and dose using:
attach(pkindivmtd)
sconc <- summarize(conc,llist(time,dose),smedian.hilow)
I get the error message
Erreur dans 1:nrow(X) : argument NA / NaN
Contents of pkindivmtd is
> contents(pkindivmtd)
Data frame:pkindivmtd 1296 observations and 9 variables Maximum #
NAs:0
Labels Units Levels Storage
dose Dose mg integer
day integer
hour integer
subject Subject integer
conc Concentration ng/mL double
fday 10 integer
fsubject 37 integer
fdose Dose 4 integer
time Time hours integer
.....>
What I am doing wrong ?
Sorry for not providing a reproducible example as when I generate
randomly the 3 variables it works !
Many thanks,
Jean-Louis
