Rob

I have run into a problem with manipulating a date vector. When I try to
cbind a date vector, it converts the date to a numerical vector. I think
this is because cbind creates a matrix, and matrix has to have numbers if I
remember correctly.

I have a friend who is really good with R and he showed me that this
represents the number of seconds since Jan 1, 1970. He was trying to convert
it with ISOdatetime and adding the number generated by cbind. This converts
it back to a date but we couldn't get it into a dataframe.

To take a step back so this in context, i'm working with a multi-relational
database. One table has all the injuries of athletes with the date of
injury. The other table has all the treatment dates for each injury. I'm
using a function to look at the treatment table and pull out the last
treatment date for each injury and I want to put this date into the
dataframe that has the list of injuries. This would give me one table for
injuries that includes the last treatment date as part of the table. The
date is then used to calculate number of days for the injury to heal, and
also will be used as the end-date when searching through a third table that
has exposures so I can count how many exposures from the injury start date
to end date.

Any ideas?

Ian