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How do I retain "POSIXct" formatting when using apply, with FUN=max? #example: mydata <- rep(Sys.time(), 10) mydf <- data.frame(matrix(data=mydata, nrow=2, ncol=length(mydata) ) ) for(i in seq(mydf))class(mydf[[i]]) <- class(mydata) str(mydf) maxdates <- apply(mydf,2,max,na.rm=T) str(maxdates) #Why is the formattign now "chr", and not

Does anyone know of any services that could be used to authenticate a user that would be a member of the general public? One of the projects we''re looking at here needs to have forms signed by parents of students. Since we simply can''t put every parent or guardian in our databse, we need a way to outsource the authentication. I''m wondering if there are any services that

By default, CentOS v5 requires a user's password when the system wakes up from the screensaver. This can be disabled by each user, but how can I disable this system-wide? Many of my users forget to do this, which results in workstations being locked up. Bob