Displaying 1 result from an estimated 1 matches for "m1date".
2008 Feb 07
1
Calculate the difference between dates
...in different groups. Each group was examined at different time points (see M1 date),but
the measurements (M1 and M2) within each group should be taken in the same day but due
to some practical issues, some M2-measurents were taken on another day. All individuals
measured at the same day in column M1date belong to one group.
For example, 24 measurements were taken 8/15/2005 (M1date column,one group of individual)
but only 4 M2-mesurements were taken at the same day, the 24-2=20 M2-measurements were
taken 2-65 days later within this group.
For analysis, I need to know how many days the M2-measu...