I have a set of data from which I am interested in analyzing the time
of day at which some key behaviors take place. The data was collected
from weekly surveillance visits in two different waves over a period of
15 weeks each. The form is:
household (1-15)
week (1-14)
wave (1, 2)
hour (13:00 23:30)
I have two questions:
1. The data was originally entered in Access where the hour variable
takes the form ##:##. When I imported the data into Stata v. 8 using
StatTransfer, Stata read the hour variable as a float and assigned it a
display format of %8.0g. The values are now decimals with a range
of .125 to .979. How can I get Stata to recognize these values as a
time-of-day and display them as ##:##?
2. If I'm not mistaken, I then need to reshape the data from long to
wide so that each household becomes a single case and each time-of-day
measurement (wave 1, week 1-14 and wave 2, week 1-14) becomes a
variable. So I should end up with 24 measurements for each of 15
cases, right? (I currently have 368 "cases"--15 x 14 x 2 minus some
losses to follow-up and some censored households--each consisting of
the 4 variables above.) How can I use the reshape commands given that
I have two levels of time measurements (wave & week)?
Many thanks in advance.
Steve
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